gpu: msm2: Sync to upstream

 * Sync with changes done in Google MSM kernel

Change-Id: I38b3d4b41a986dc16097b838afc770e372ddfc7d
kbuild: Build fixes and additional headers

 * Export dsps header to build sensors lib
 * Re-add macros to fix build (match 8974)

Change-Id: Ib967079dce868a97b6f640c67850e199a8e35d3a