drm/tegra: Remove surplus else after return

else is not generally useful after return
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230626143331.640454-2-suijingfeng@loongson.cn

drivers/gpu/drm/tegra/gem.c

@@ -180,15 +180,15 @@ static void *tegra_bo_mmap(struct host1x_bo *bo)
 	struct iosys_map map;
 	int ret;
 
-	if (obj->vaddr) {
+	if (obj->vaddr)
 		return obj->vaddr;
-	} else if (obj->gem.import_attach) {
+
+	if (obj->gem.import_attach) {
 		ret = dma_buf_vmap_unlocked(obj->gem.import_attach->dmabuf, &map);
 		return ret ? NULL : map.vaddr;
-	} else {
-		return vmap(obj->pages, obj->num_pages, VM_MAP,
-			    pgprot_writecombine(PAGE_KERNEL));
 	}
+
+	return vmap(obj->pages, obj->num_pages, VM_MAP, pgprot_writecombine(PAGE_KERNEL));
 }
 
 static void tegra_bo_munmap(struct host1x_bo *bo, void *addr)
@@ -198,10 +198,11 @@ static void tegra_bo_munmap(struct host1x_bo *bo, void *addr)
 
 	if (obj->vaddr)
 		return;
-	else if (obj->gem.import_attach)
-		dma_buf_vunmap_unlocked(obj->gem.import_attach->dmabuf, &map);
-	else
-		vunmap(addr);
+
+	if (obj->gem.import_attach)
+		return dma_buf_vunmap_unlocked(obj->gem.import_attach->dmabuf, &map);
+
+	vunmap(addr);
 }
 
 static struct host1x_bo *tegra_bo_get(struct host1x_bo *bo)