gralloc: samsung's patch for exynos5410 support

Change-Id: I27abb9e05045c97af6771d189d77056748d081d7
Merge remote-tracking branch 'Alberto96/cm-11.0' into cm-11.0
gralloc.h: change pvr flag
Merge pull request #1 from GearCM/cm-11.0

Merge