Rework gpio phandle parsing

[Grant Likely]

I originally posted this as part of the DT clock bindings.  I'm reposting
now since I've fixed up some bugs and I'm planning to put them into
linux-next.

The DT clock binding patches will be posted separately.

Cheers,
g.


 arch/arm/boot/dts/testcases/tests-phandle.dtsi |   37 ++++++
 arch/arm/boot/dts/testcases/tests.dtsi         |    1 +
 arch/arm/boot/dts/versatile-pb.dts             |    2 +
 arch/microblaze/kernel/reset.c                 |   43 +-------
 arch/powerpc/sysdev/qe_lib/gpio.c              |   42 ++------
 drivers/gpio/gpiolib.c                         |    2 +-
 drivers/of/Kconfig                             |    9 ++
 drivers/of/Makefile                            |    1 +
 drivers/of/base.c                              |  146 ++++++++++++------------
 drivers/of/gpio.c                              |   43 +++----
 drivers/of/selftest.c                          |  139 ++++++++++++++++++++++
 include/asm-generic/gpio.h                     |    6 +-
 include/linux/of.h                             |   11 ++-
 include/linux/of_gpio.h                        |   10 +-
 14 files changed, 313 insertions(+), 179 deletions(-)