sandbox: enable command aes

This commit enable the command aes on sandbox.
Then, it may be used on pytest.
Signed-off-by: NPhilippe Reynes <philippe.reynes@softathome.com>

configs/sandbox_defconfig

@@ -67,6 +67,7 @@ CONFIG_CMD_QFW=y
 CONFIG_CMD_BOOTSTAGE=y
 CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_AES=y
 CONFIG_CMD_TPM=y
 CONFIG_CMD_TPM_TEST=y
 CONFIG_CMD_BTRFS=y