msm: kgsl: Align ION buffer mappings from userspace to 4k
msm: kgsl: Align ION buffer mappings from userspace to 4k

When userspace allocates an ION buffer and maps it to GPU virtual space,
adjust the buffer size to be 4k aligned before mapping it to GPU virtual
space. GPU virtual space map routine expects the buffer to be 4k aligned.

Change-Id: Ibdb95597c24e2b5d0c3390d2c8550abb6b4b730b
Acked-by: Rama Vaddula <c6833d607636f16ca49565dfcb7c970394ab64f3@qualcomm.com>
Signed-off-by: Tarun Karra <130908656622cf304523d334877ef0f505f9a71e@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas