Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

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

Add gpiokeys to the list of GPIO modules built only if FDT is enabled

When building modules, define make variable OPT_FDT if the kernel config
includes the FDT option. Use OPT_FDT to conditionally compile modules
that require FDT support.

In the past we've gotten away with using the arch name as a proxy for FDT
support in makefile conditional logic, but now mips has some platforms with
fdt support and some without and we need a more direct test.

Fix parallel builds by specifying *all* required headers in SRCS.

Submitted by: manu
Pointy hat: ian

[gpio] add gpiospi to the gpio module.

Add a PPS driver that takes the timing pulse from a gpio pin. Currently
supports only ofw/fdt systems. Some day, hinted attachment for non-fdt
systems should be possible too.

[gpiospi] add initial gpio SPI bit bang driver.

Submitted by: ray
Obtained from: zrouter

Revert r299739. That did not make it better.
Instead disconnect gpiokeys from the build until it's fixed and buildable;
the SUBDIR list was not ordered properly anyway ;-)

Blind long shot. Add ofw_gpiobus.c to the SRCS list in the hope to
make the remaining MIPS kernels compile which set MODULES_OVERRIDE="gpio..."

Add loadable module for gpiokeys

Fix the build of gpiobus as a module.

Add the missing newbus interfaces and gpioc, which is part of basic gpiobus
framework.

Sponsored by: Rubicon Communications (Netgate)

Inspired by r262522, fix make depend. This fixes the build of gpio modules.

Approved by: adrian (mentor)

Allow building the GPIO bus and associated bits as modules.

This is primarily done to save a few bytes here and there on embedded
systems with limited flash space for kernels - a very limited (sub-1MB)
space may be available for the kernel and may only support gzip encoding.
The rootfs can be LZMA compressed.