tools: imx8mimage: fix HDMI/FIT parsing

Add missed break for HDMI entry.
And moving FIT parsing earlier, because it does not have parameter,
it will not runs into CFG_REG_SIZE.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/tools/imx8mimage.c b/tools/imx8mimage.c
index 50a256c..6c02337 100644
--- a/tools/imx8mimage.c
+++ b/tools/imx8mimage.c
@@ -99,8 +99,6 @@
 		break;
 	case CMD_SIGNED_HDMI:
 		signed_hdmi = token;
-	case CMD_FIT:
-		using_fit = 1;
 		break;
 	case CMD_DDR_FW:
 		/* Do nothing */
@@ -120,6 +118,11 @@
 				name, lineno, token);
 			exit(EXIT_FAILURE);
 		}
+		switch (*cmd) {
+		case CMD_FIT:
+			using_fit = 1;
+			break;
+		}
 		break;
 	case CFG_REG_SIZE:
 		parse_cfg_cmd(*cmd, token, name, lineno);