CMD: Fix typo KGBD -> KGDB on debris board

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: dogoil@etinsys.com
Acked-by: Anatolij Gustschin <agust@denx.de>

include/configs/debris.h

@@ -148,7 +148,7 @@
 #define CONFIG_CMD_ELF
 #define CONFIG_CMD_I2C
 #define CONFIG_CMD_JFFS2
-#define CONFIG_CMD_KGBD
+#define CONFIG_CMD_KGDB
 #define CONFIG_CMD_PCI
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_SAVES