msm: kgsl: Update various exernal APIs for the 4.4 kernel

msm: kgsl: Update various exernal APIs for the 4.4 kernel

Make several changes to build the GPU driver for 4.4:

 - Rename CONFIG_MSM to CONFIG_QCOM where applicable
 - Add msm_kgsl.h to the Kbuild exports
 - Remove linux/coresight_of.h (as it has been merged into
   coresight.h) and remove the .owner member of the
   coresight_desc struct.
 - Use the new location for the sync.h file (in staging)
 - Remove an unused sync function
 - Move oneshot_sync.h inside of #ifdef wrappers

Signed-off-by: Jordan Crouse <jcrouse@codeauorora.org>