panfrost: Fix memory leaks on unit test failures.

Change ASSERT_EQ to EXPECT_EQ to avoid aborting before freeing memory.

Fix defects reported by Coverity Scan.

Resource leak (RESOURCE_LEAK)
leaked_storage: Variable tiled going out of scope leaks the storage it points to.
leaked_storage: Variable linear going out of scope leaks the storage it points to.
leaked_storage: Variable ref going out of scope leaks the storage it points to.

Fixes: bb6c14a6

 ("panfrost: Unit test u-interleaved tiling routines")
Suggested-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Part-of: <!16127>

src/panfrost/shared/test/test-tiling.cpp

@@ -160,9 +160,9 @@ test(unsigned width, unsigned height, unsigned rx, unsigned ry,
                     dst_stride, src_stride, format, store);
 
    if (store)
-      ASSERT_EQ(memcmp(ref, tiled, bpp * tiled_width * tiled_height), 0);
+      EXPECT_EQ(memcmp(ref, tiled, bpp * tiled_width * tiled_height), 0);
    else
-      ASSERT_EQ(memcmp(ref, linear, bpp * rw * linear_stride), 0);
+      EXPECT_EQ(memcmp(ref, linear, bpp * rw * linear_stride), 0);
 
    free(ref);
    free(tiled);