[PATCH 08/10] ARM: omap2: add explict mach/gpio.h includes

* Rob Herring [off-list ref] [120829 15:32]:

From: Rob Herring <redacted>

In preparation to remove implicit inclusion of mach/gpio.h, add explict
include of mach/gpio.h.

Just for reference, as Rob already mentioned, these should no longer be
needed for omaps after the "Clean up hardcoded IRQs for mach-omap2,
enable SPARSE_IRQ, plaform_data/gpio-omap.h" series I posted yesterday.

Regards,

Tony