drm/msm/dpu: fix error pointer dereference in msm_kms_init_aspace()

If msm_gem_address_space_create() fails, then return right away.
Otherwise it leads to a Oops when we dereference "aspace" on the next
line.

Fixes: eabba31 ("drm/msm: register a fault handler for display mmu faults")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Reviewed-by: Abhinav Kumar <[email protected]>
Patchwork: https://patchwork.freedesktop.org/patch/639357/
Link: https://lore.kernel.org/r/[email protected]
[DB: fixed commit id]
Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: Dan Carpenter

drivers/gpu/drm/msm/msm_kms.c

@@ -209,6 +209,7 @@ struct msm_gem_address_space *msm_kms_init_aspace(struct drm_device *dev)
 	if (IS_ERR(aspace)) {
 		dev_err(mdp_dev, "aspace create, error %pe\n", aspace);
 		mmu->funcs->destroy(mmu);
+		return aspace;
 	}
 
 	msm_mmu_set_fault_handler(aspace->mmu, kms, msm_kms_fault_handler);