gpu: ion: make cached cp allocations multiples of PAGE_SIZE
gpu: ion: make cached cp allocations multiples of PAGE_SIZE

New alignment requirements in Ion require all cached allocations to be
multiples of PAGE_SIZE. Update the cp heap to follow the new
requirements.

Change-Id: I88ddf55966ccba3a00da99559b1ff4a3b6e86ce5
Signed-off-by: Mitchel Humpherys <5070267e141ca308fc855217ddbeaf20e729a7bf@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