lights: Adding keypad alt/shift LED light IDs

in conjunction with the keyboard light patch for
frameworks/base:
http://review.cyanogenmod.org/77945

Change-Id: Ie97a80d398d474950340cba60c48ba5904978ec5
gralloc: added exynos4 specific usage bits

Change-Id: Ibd06f153bdfd282993b3f633da82d9a7017aad61
exynos4: gralloc: add camera and nonecache usage

Change-Id: I53a7dfc8355a05aeae007e7d61c4d95cce125bfd