rt2x00:Add RT539b chipset support

Signed-off-by: Zero.Lin <Zero.Lin@mediatek.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index 931331d..cad25bf 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -1192,6 +1192,7 @@
 	{ PCI_DEVICE(0x1814, 0x5390) },
 	{ PCI_DEVICE(0x1814, 0x5392) },
 	{ PCI_DEVICE(0x1814, 0x539a) },
+	{ PCI_DEVICE(0x1814, 0x539b) },
 	{ PCI_DEVICE(0x1814, 0x539f) },
 #endif
 	{ 0, }