MFC r306262, r306267, r310021: (needed to avoid conflicts on later merges)

Remove bus_dma_get_range and bus_dma_get_range_nb on armv6. We only need
this on a few earlier arm SoCs.

Restrict where we need to define fdt_fixup_table to just PowerPC and
Marvell.

Add the missing void to function signatures in much of the arm code.

MFC r306902:

ARM: Remove unused includes.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Move arm's devmap to some generic place, so it can be used
by other architectures.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D6091
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

Rename ARM_INTRNG and MIPS_INTRNG to INTRNG. This will help with machine
independent code that needs to know about INTRNG such as PCI drivers.

Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation

Stop defining fdt_pic_table when building for ARM_INTRNG.

Include "opt_platform.h" to fix kernel build for amlogic devices.

Clean up the Amlogic interrupt controller driver to handle the case where
we have both the Amlogic pic and a GIC. This may be the case in some
configurations.

Differential Revision: https://reviews.freebsd.org/D2432
Submitted by: John Wehle <john@feith.com>

Disable WPI in case of aml8726-m3.
The aml8726-m3 SoC is identified as a Cortex A9-r2 rev 4 CPU and
it hangs sometimes during the boot when WFI is used by the kernel.

Differential Revision: https://reviews.freebsd.org/D2473
Submitted by: John Wehle
Suggested by: ian@

This modifies several FreeBSD drivers to use the GNU approach to
supply clk81 information. It also changes the hardware strings
in some of the drivers to match what's present in the GNU files.

Submitted by: John Wehle
Reviewed by: imp

Add necessary changes to support various Amlogic SoC devices
specially aml8726-m6 and aml8726-m8b SoC based devices.
aml8726-m6 SoC exist in devices such as Visson ATV-102.
Hardkernel ODROID-C1 board has aml8726-m8b SoC.

The following support is included:
Basic machdep code
SMP
Interrupt controller
Clock control driver (aka gate)
Pinctrl
Timer
Real time clock
UART
GPIO
I2C
SD controller
SDXC controller
USB
Watchdog
Random number generator
PLL / Clock frequency measurement
Frame buffer

Submitted by: John Wehle
Approved by: stas (mentor)