rt2x00: add MediaTek/RaLink Rt3352 WiSoC

Support for the RT3352 WiSoC was developed for and tested with the ALL5002
devboard running OpenWrt. For now, this supports only devices with internal
TXALC. Corrections were made according to the remarks of Stanislaw Gruszka and
Gertjan van Wingerde, thank you guys for reviewing!

Signed-off-by: Daniel Golle <dgolle@allnet.de>
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 e13916f..6d67c3e 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -1943,6 +1943,11 @@
 #define BBP47_TSSI_ADC6			FIELD8(0x80)
 
 /*
+ * BBP 49
+ */
+#define BBP49_UPDATE_FLAG		FIELD8(0x01)
+
+/*
  * BBP 109
  */
 #define BBP109_TX0_POWER		FIELD8(0x0f)