rt2x00:Add RT5392 chipset support

Signed-off-by: Zero.Lin <Zero.Lin@mediatek.com>
Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
index 6403f49..1ca88cd 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -72,6 +72,7 @@
 #define RF5370				0x5370
 #define RF5372				0x5372
 #define RF5390				0x5390
+#define RF5392				0x5392
 
 /*
  * Chipset revisions.
@@ -1946,6 +1947,11 @@
 #define RFCSR49_TX			FIELD8(0x3f)
 
 /*
+ * RFCSR 50:
+ */
+#define RFCSR50_TX			FIELD8(0x3f)
+
+/*
  * RF registers
  */