test_fs: Test 'mv' command on exfat and fs_generic

Enable tests for the generic FS interface 'mv' command against
both exfat and fs_generic.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/test/py/tests/test_fs/conftest.py b/test/py/tests/test_fs/conftest.py
index c73fb4a..0205048 100644
--- a/test/py/tests/test_fs/conftest.py
+++ b/test/py/tests/test_fs/conftest.py
@@ -17,7 +17,7 @@
 supported_fs_mkdir = ['fat12', 'fat16', 'fat32', 'exfat', 'fs_generic']
 supported_fs_unlink = ['fat12', 'fat16', 'fat32', 'exfat', 'fs_generic']
 supported_fs_symlink = ['ext4']
-supported_fs_rename = ['fat12', 'fat16', 'fat32']
+supported_fs_rename = ['fat12', 'fat16', 'fat32', 'exfat', 'fs_generic']
 
 #
 # Filesystem test specific setup