xen/arm: smmuv3: Remove unnecessary oom message

xen/arm: smmuv3: Remove unnecessary oom message

Backport Linux commit affa909571b0. This is the clean backport without
any changes.

Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory' message

Remove it can help us save a bit of memory.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210609125438.14369-1-thunder.leizhen@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git affa909571b0
Signed-off-by: Rahul Singh <rahul.singh@arm.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>