smc911x: add 16 bit support

Signed-off-by: Jens Gehrlein <sew_s@tqs.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/README b/README
index f14fb7b..f3957f1 100644
--- a/README
+++ b/README
@@ -786,6 +786,21 @@
 			Define this to use i/o functions instead of macros
 			(some hardware wont work with macros)
 
+		CONFIG_DRIVER_SMC911X
+		Support for SMSC's LAN911x and LAN921x chips
+
+			CONFIG_DRIVER_SMC911X_BASE
+			Define this to hold the physical address
+			of the device (I/O space)
+
+			CONFIG_DRIVER_SMC911X_32_BIT
+			Define this if data bus is 32 bits
+
+			CONFIG_DRIVER_SMC911X_16_BIT
+			Define this if data bus is 16 bits. If your processor
+			automatically converts one 32 bit word to two 16 bit
+			words you may also try CONFIG_DRIVER_SMC911X_32_BIT.
+
 - USB Support:
 		At the moment only the UHCI host controller is
 		supported (PIP405, MIP405, MPC5200); define