davinci: omapl138_lcdk: improve readability of boot command

Improve the readability of the boot command. This will help a later
commit that adds DT support.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/omapl138_lcdk.h b/include/configs/omapl138_lcdk.h
index fd88f12..06a62cd 100644
--- a/include/configs/omapl138_lcdk.h
+++ b/include/configs/omapl138_lcdk.h
@@ -267,7 +267,24 @@
 #define CONFIG_REVISION_TAG
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_BOOTARGS		"console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootwait ip=off"
-#define CONFIG_BOOTCOMMAND	"if mmc rescan; then if fatload mmc 0 0xc0600000 boot.scr; then source 0xc0600000; else fatload mmc 0 0xc0700000 uImage; bootm c0700000; fi; else sf probe 0; sf read 0xc0700000 0x80000 0x220000; bootm 0xc0700000; fi"
+#define CONFIG_BOOTCOMMAND \
+	"if mmc rescan; then " \
+		"run mmcboot; " \
+	"else " \
+		"run spiboot; " \
+	"fi"
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"mmcboot=" \
+		"if fatload mmc 0 0xc0600000 boot.scr; then " \
+			"source 0xc0600000; " \
+		"else " \
+			"fatload mmc 0 0xc0700000 uImage; " \
+			"bootm 0xc0700000; " \
+		"fi;\0" \
+	"spiboot=" \
+		"sf probe 0; " \
+		"sf read 0xc0700000 0x80000 0x220000; " \
+		"bootm 0xc0700000;\0"
 
 /*
  * U-Boot commands