r7780mp: fix typo in Ethernet chip model number comment.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@noser.com>

include/configs/r7780mp.h

@@ -154,7 +154,7 @@
 #define CONFIG_NET_MULTI
 #define CONFIG_RTL8169
 */
-/* AX88696L Support(NE2000 base chip) */
+/* AX88796L Support(NE2000 base chip) */
 #define CONFIG_DRIVER_NE2000
 #define CONFIG_DRIVER_AX88796L
 #define CONFIG_DRIVER_NE2000_BASE	0xA4100000