gpu-ion: Add ION support

Taken from Lexmaster's kernel
Signed-off-by: helicopter88 <johnlemon.lol@gmail.com>

Change-Id: I4cdbe443f672c45ddaef67c146e855c8ec341306

Conflicts:
	drivers/gpu/ion/msm/msm_ion.c
gpu-ion: Fix Add ION support conflicts

Change-Id: I2397836509508be61bfa395f1b2d0af64650d6f3