gpio: pl061: Readd removed platform data

The custom Axxia gpio driver is based on the PL061 driver, but
the PL061 platform data was removed starting with
commit 562b4884 ("gpio: pl061: move platform data into driver").

Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Charlie Paul <charlie.paul@windriver.com>
Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>