msm_iommu_probe() didn't free mem_region and mapped IO.
Also if request_mem_region() failed then error handling
code dereferenced NULL pointer.
Signed-off-by: NVasiliy Kulikov <segooon@gmail.com>
Acked-by: NStepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>