gpu: ion: Stop trying to allocate from an order on first failure

With this patch the system heap will only try to allocate from each
order as long as allocations succeed.  If it failes to obtain a higher
order allocation, it doesn't retry that order.

Change-Id: I05319ef5cf0928c7ec8d59dc42a622da95d962f5
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Git-commit: 972f117fbe5aedd2a0598a3e05a9f7cffe556adb
Git-repo: https://android.googlesource.com/kernel/common


Signed-off-by: Laura Abbott <lauraa@codeaurora.org>