rt2x00: Unify GPIO register field namings

The various rt2x00 drivers use different methods to name the different
GPIO register fields indicating the GPIO pin value and the fields
indicating the direction.
Start using a unified naming scheme for the GPIO register fields:
	- <csr>_VAL<x> for fields indicating the GPIO pin value.
	- <csr>_DIR<x> for fields indicating the GPIO pin direction.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo Van Doorn <ivdoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.h b/drivers/net/wireless/rt2x00/rt2500usb.h
index 9652300..1b91a4c 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.h
+++ b/drivers/net/wireless/rt2x00/rt2500usb.h
@@ -187,24 +187,26 @@
 
 /*
  * MAC_CSR19: GPIO control register.
+ *	MAC_CSR19_VALx: GPIO value
+ *	MAC_CSR19_DIRx: GPIO direction: 0 = input; 1 = output
  */
 #define MAC_CSR19			0x0426
-#define MAC_CSR19_BIT0			FIELD16(0x0001)
-#define MAC_CSR19_BIT1			FIELD16(0x0002)
-#define MAC_CSR19_BIT2			FIELD16(0x0004)
-#define MAC_CSR19_BIT3			FIELD16(0x0008)
-#define MAC_CSR19_BIT4			FIELD16(0x0010)
-#define MAC_CSR19_BIT5			FIELD16(0x0020)
-#define MAC_CSR19_BIT6			FIELD16(0x0040)
-#define MAC_CSR19_BIT7			FIELD16(0x0080)
-#define MAC_CSR19_BIT8			FIELD16(0x0100)
-#define MAC_CSR19_BIT9			FIELD16(0x0200)
-#define MAC_CSR19_BIT10			FIELD16(0x0400)
-#define MAC_CSR19_BIT11			FIELD16(0x0800)
-#define MAC_CSR19_BIT12			FIELD16(0x1000)
-#define MAC_CSR19_BIT13			FIELD16(0x2000)
-#define MAC_CSR19_BIT14			FIELD16(0x4000)
-#define MAC_CSR19_BIT15			FIELD16(0x8000)
+#define MAC_CSR19_VAL0			FIELD16(0x0001)
+#define MAC_CSR19_VAL1			FIELD16(0x0002)
+#define MAC_CSR19_VAL2			FIELD16(0x0004)
+#define MAC_CSR19_VAL3			FIELD16(0x0008)
+#define MAC_CSR19_VAL4			FIELD16(0x0010)
+#define MAC_CSR19_VAL5			FIELD16(0x0020)
+#define MAC_CSR19_VAL6			FIELD16(0x0040)
+#define MAC_CSR19_VAL7			FIELD16(0x0080)
+#define MAC_CSR19_DIR0			FIELD16(0x0100)
+#define MAC_CSR19_DIR1			FIELD16(0x0200)
+#define MAC_CSR19_DIR2			FIELD16(0x0400)
+#define MAC_CSR19_DIR3			FIELD16(0x0800)
+#define MAC_CSR19_DIR4			FIELD16(0x1000)
+#define MAC_CSR19_DIR5			FIELD16(0x2000)
+#define MAC_CSR19_DIR6			FIELD16(0x4000)
+#define MAC_CSR19_DIR7			FIELD16(0x8000)
 
 /*
  * MAC_CSR20: LED control register.