msm: kgsl: flush outer cache for alloc_page() pages

The outer cache needs to be flushed for these pages
after they are allocated so that the GPU and CPU
have a consistent view of them.

drivers/gpu/msm/kgsl_sharedmem.c

@@ -372,6 +372,8 @@ _kgsl_sharedmem_vmalloc(struct kgsl_memdesc *memdesc,
 		}
 		sg_set_page(&memdesc->sg[i], page, PAGE_SIZE, 0);
 	}
+    outer_cache_range_op_sg(memdesc->sg, memdesc->sglen,
+                            KGSL_CACHE_OP_FLUSH);
 
 	kgsl_cache_range_op(memdesc, KGSL_CACHE_OP_INV);