rt2x00: fix spelling mistake in various macros, UKNOWN -> UNKNOWN

Rename several macros that contain mispellings of UNKNOWN
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ralink/rt2x00/rt2800.h

@@ -1194,10 +1194,10 @@
 #define TX_PWR_CFG_3_MCS13		FIELD32(0x000000f0)
 #define TX_PWR_CFG_3_MCS14		FIELD32(0x00000f00)
 #define TX_PWR_CFG_3_MCS15		FIELD32(0x0000f000)
-#define TX_PWR_CFG_3_UKNOWN1		FIELD32(0x000f0000)
-#define TX_PWR_CFG_3_UKNOWN2		FIELD32(0x00f00000)
-#define TX_PWR_CFG_3_UKNOWN3		FIELD32(0x0f000000)
-#define TX_PWR_CFG_3_UKNOWN4		FIELD32(0xf0000000)
+#define TX_PWR_CFG_3_UNKNOWN1		FIELD32(0x000f0000)
+#define TX_PWR_CFG_3_UNKNOWN2		FIELD32(0x00f00000)
+#define TX_PWR_CFG_3_UNKNOWN3		FIELD32(0x0f000000)
+#define TX_PWR_CFG_3_UNKNOWN4		FIELD32(0xf0000000)
 /* bits for 3T devices */
 #define TX_PWR_CFG_3_MCS12_CH0		FIELD32(0x0000000f)
 #define TX_PWR_CFG_3_MCS12_CH1		FIELD32(0x000000f0)
@@ -1217,10 +1217,10 @@
  * TX_PWR_CFG_4:
  */
 #define TX_PWR_CFG_4			0x1324
-#define TX_PWR_CFG_4_UKNOWN5		FIELD32(0x0000000f)
-#define TX_PWR_CFG_4_UKNOWN6		FIELD32(0x000000f0)
-#define TX_PWR_CFG_4_UKNOWN7		FIELD32(0x00000f00)
-#define TX_PWR_CFG_4_UKNOWN8		FIELD32(0x0000f000)
+#define TX_PWR_CFG_4_UNKNOWN5		FIELD32(0x0000000f)
+#define TX_PWR_CFG_4_UNKNOWN6		FIELD32(0x000000f0)
+#define TX_PWR_CFG_4_UNKNOWN7		FIELD32(0x00000f00)
+#define TX_PWR_CFG_4_UNKNOWN8		FIELD32(0x0000f000)
 /* bits for 3T devices */
 #define TX_PWR_CFG_4_STBC4_CH0		FIELD32(0x0000000f)
 #define TX_PWR_CFG_4_STBC4_CH1		FIELD32(0x000000f0)