disp: msm: adjust smmu detach sequence to include unmapping

Device needs to remove mappings prior to iommu detach call.

Change-Id: I1bfe771ec34bd75742c40aaa4d95528d82386f48
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/msm_smmu.c

@@ -94,6 +94,7 @@ static void msm_smmu_detach(struct msm_mmu *mmu, const char * const *names,
 		return;
 
 	pm_runtime_get_sync(mmu->dev);
+	msm_dma_unmap_all_for_dev(client->dev);
 	iommu_detach_device(client->domain, client->dev);
 	pm_runtime_put_sync(mmu->dev);