ANDROID: ion: Change minimum allocation order to PAGE_SHIFT

In carveout heap, change minimum allocation order from 12 to
PAGE_SHIFT, After this change each bit in bitmap (genalloc - General
purpose special memory pool) represents one page size memory.

Cc:sprd-ind-kernel-group@googlegroups.com
Cc:sanjeev.yadav@spreadtrum.com
Cc:Colin Cross <ccross@android.com>
cc:John Stultz <john.stultz@linaro.org>

Signed-off-by: Rajmal Menariya <rajmal.menariya@spreadtrum.com>

Bug: None
Patchset: staging-android-ion

Signed-off-by: Mattias Nissler <mnissler@google.com>
Change-Id: I1439e7cb147303caf3549bb295bc8d27eca8c380
1 file changed