SPEAr: Configure network support for spear SoCs

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/spear3xx.h b/include/configs/spear3xx.h
index 2a86c21..035b321 100644
--- a/include/configs/spear3xx.h
+++ b/include/configs/spear3xx.h
@@ -41,6 +41,9 @@
 
 #include <configs/spear-common.h>
 
+/* Ethernet driver configuration */
+#define CONFIG_DW_ALTDESCRIPTOR			1
+
 /* Serial Configuration (PL011) */
 #define CONFIG_SYS_SERIAL0			0xD0000000