rt2x00: Remove check for rf word 0

The only way rf_write() can be called with word 0 is
when the user sends the wrong word index through debugfs.
However the values which are send through debugfs are
validated using the RF_BASE and RF_SIZE macro values,
the most logical solution is to increase RF_BASE with 4
and decrease RF_SIZE with 4 (RF_SIZE has always been
1 word too big)

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.h b/drivers/net/wireless/rt2x00/rt2500pci.h
index 17a0c9c..ce2f065 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.h
+++ b/drivers/net/wireless/rt2x00/rt2500pci.h
@@ -59,8 +59,8 @@
 #define EEPROM_SIZE			0x0200
 #define BBP_BASE			0x0000
 #define BBP_SIZE			0x0040
-#define RF_BASE				0x0000
-#define RF_SIZE				0x0014
+#define RF_BASE				0x0004
+#define RF_SIZE				0x0010
 
 /*
  * Number of TX queues.