gpio: of: Add support for making pin in non-GPIO mode from DT

gpio: of: Add support for making pin in non-GPIO mode from DT

Add support to make the pin to make as non-GPIO mode from DT.
This will help to make the pin in function mode if bootloader
made it to GPIO mode.

Bug 200305703

Change-Id: I8cfc31b551bb16d1eac7c1f8d280655a1f028cb1
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/1317924
(cherry picked from commit 6ce5123fd9cfbbb8cac92ec8f8b13cbc206af3c5)
Signed-off-by: Shreshtha SAHU <ssahu@nvidia.com>
Reviewed-on: http://git-master/r/1491906