arm: MediaTek: add ethernet support for MT7623 boards

Enable ethernet related configs to mt7623n_bpir2_defconfig.
Add default IP addresses.
Enable noncached memory region required by ethernet driver.

Signed-off-by: Mark Lee <Mark-MC.Lee@mediatek.com>
diff --git a/include/configs/mt7623.h b/include/configs/mt7623.h
index ba76350..5129c83 100644
--- a/include/configs/mt7623.h
+++ b/include/configs/mt7623.h
@@ -24,6 +24,7 @@
 
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN		SZ_4M
+#define CONFIG_SYS_NONCACHED_MEMORY	SZ_1M
 
 /* Environment */
 #define CONFIG_ENV_SIZE			SZ_4K
@@ -53,4 +54,8 @@
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 	FDT_HIGH
 
+/* Ethernet */
+#define CONFIG_IPADDR			192.168.1.1
+#define CONFIG_SERVERIP			192.168.1.2
+
 #endif