tools: imx8mimage: Fix potential memory leak

Dynamic memory, referenced by 'line', is allocated at imx8mimage.c:187
by calling function 'getline' and lost at imx8mimage.c:210.

Signed-off-by: Maks Mishin <maks.mishinFZ@gmail.com>

tools/imx8mimage.c

@@ -206,6 +206,7 @@ static uint32_t parse_cfg_file(char *name)
 		}
 	}
 
+	free(line);
 	fclose(fd);
 	return 0;
 }