include/configs: ls1012afrwy: support dhcp boot

Add support of dhcp boot for ls1012afrwy

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/include/configs/ls1012afrwy.h b/include/configs/ls1012afrwy.h
index 6143e97..de68689 100644
--- a/include/configs/ls1012afrwy.h
+++ b/include/configs/ls1012afrwy.h
@@ -33,7 +33,8 @@
 #undef BOOT_TARGET_DEVICES
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 0) \
-	func(USB, usb, 0)
+	func(USB, usb, 0) \
+	func(DHCP, dhcp, na)
 #endif
 
 #undef FSL_QSPI_FLASH_SIZE