Squashed Commit: msm_fb: Make buffers aligned to 4K page boundary
This change makes the frame buffers aligned to the page
boundary. Improves GPU performance since accessing the
frame buffer from page boundary is faster.

CRs-fixed: 325134
Change-Id: I6ce4477f62536a3cd81064e26dc08f2b199e181b
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: nobodyAtall <tsogkas@ceid.upatras.gr>

msm_fb: Clean up of frame buffer 4KB alignment changes
Remove redundant code from the 4 KB alignment patch
and reduce the overhead of calculation of the hole
size by using bitwise operators in its calculation.

Change-Id: I1706484249bf8e01b250e91fa87e00f6021d9a72
CRs-fixed: 325134
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: nobodyAtall <tsogkas@ceid.upatras.gr>