siemens: change LED indication in DFU mode

In order to have the same LED indication like in another product
when ready for updating, enable only red led and disable status
LED when entering DFU mode.

The status LED is only switched off when defined in board file.

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Wolfgang Denk <wd@denx.de>

include/configs/dxr2.h

@@ -24,7 +24,8 @@
 #undef CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC
 
 #define BOARD_DFU_BUTTON_GPIO	27
-#define BOARD_DFU_BUTTON_LED	64
+#define BOARD_DFU_BUTTON_LED	64	/* red LED */
+#define BOARD_STATUS_LED	103	/* green LED */
 #define GPIO_LAN9303_NRST	88	/* GPIO2_24 = gpio88 */
 
 #undef CONFIG_DOS_PARTITION

include/configs/siemens-am33x-common.h

@@ -402,7 +402,11 @@
 	"dfu_args=run bootargs_defaults;" \
 		"setenv bootargs ${bootargs} ;" \
 		"mtdparts default; " \
-		"dfu 0 nand 0; \0" \
+		"led dfu 1;" \
+		"led stat 0;" \
+		"dfu 0 nand 0;" \
+		"led dfu 0;" \
+		"led stat 1;\0" \
 		"dfu_alt_info=" DFU_ALT_INFO_NAND "\0" \
 	"net_args=run bootargs_defaults;" \
 		"mtdparts default;" \