ARM: dts: renesas: r8a73a4: Fix external clocks and clock rate

External clocks should be defined as zero-Hz clocks in the SoC .dtsi,
and overridden in the board .dts when present.

Correct the clock rate of extal1 from 25 to 26 MHz, to match the crystal
oscillator present on the APE6-EVM board.

Fixes: a76809a329d6ebae ("ARM: shmobile: r8a73a4: Common clock framework DT description")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/1692bc8cd465d62168cbf110522ad62a7af3f606.1705315614.git.geert+renesas@glider.be

ARM: dts: renesas: ape6evm: Drop bogus "mtd-rom" compatible value

make dtbs_check:

arch/arm/boot/dts/r8a73a4-ape6evm.dtb: flash@0: compatible: 'oneOf' conditional failed, one must be fixed:
['cfi-flash', 'mtd-rom'] is too long
'cfi-flash' is not one of ['amd,s29gl01gp', 'amd,s29gl032a', 'amd,s29gl256n', 'amd,s29gl512n', 'arm,versatile-flash', 'arm,vexpress-flash', 'cortina,gemini-flash', 'cypress,hyperflash', 'ge,imp3a-firmware-mirror', 'ge,imp3a-paged-flash', 'gef,ppc9a-firmware-mirror', 'gef,ppc9a-paged-flash', 'gef,sbc310-firmware-mirror', 'gef,sbc310-paged-flash', 'gef,sbc610-firmware-mirror', 'gef,sbc610-paged-flash', 'intel,28f128j3', 'intel,dt28f160', 'intel,ixp4xx-flash', 'intel,JS28F128', 'intel,JS28F640', 'intel,PC28F640P30T85', 'numonyx,js28f00a', 'numonyx,js28f128', 'sst,sst39vf320', 'xlnx,xps-mch-emc-2.00.a']
'cfi-flash' is not one of ['cypress,cy7c1019dv33-10zsxi', 'arm,vexpress-psram']
'mtd-rom' is not one of ['cfi-flash', 'jedec-flash']
'mtd-ram' was expected
From schema: Documentation/devicetree/bindings/mtd/mtd-physmap.yaml

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/1c773aed6bd794cf36a9a787f77469eaa1359bef.1693481518.git.geert+renesas@glider.be

ARM: dts: Move .dts files to vendor sub-directories

The arm dts directory has grown to 1559 boards which makes it a bit
unwieldy to maintain and use. Past attempts stalled out due to plans to
move .dts files out of the kernel tree. Doing that is no longer planned
(any time soon at least), so let's go ahead and group .dts files by
vendors. This move aligns arm with arm64 .dts file structure.

There's no change to dtbs_install as the flat structure is maintained on
install.

The naming of vendor directories is roughly in this order of preference:
- Matching original and current SoC vendor prefix/name (e.g. ti, qcom)
- Current vendor prefix/name if still actively sold (SoCs which have
been aquired) (e.g. nxp/imx)
- Existing platform name for older platforms not sold/maintained by any
company (e.g. gemini, nspire)

The whole move was scripted with the exception of MAINTAINERS and a few
makefile fixups.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michal Simek <michal.simek@amd.com> #Xilinx
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Paul Barker <paul.barker@sancloud.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Wei Xu <xuwei5@hisilicon.com> #hisilicon
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Nick Hawkins <nick.hawkins@hpe.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com> #broadcom
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Acked-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Romain Perier <romain.perier@gmail.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>