rt2x00: Always enable TSF ticking

Whatever mode we are in, according to the legacy drivers
we should always enable TSF ticking/counting.
We should also always enable the TBCN/TBTT field,
this field is only disabled during beacon regeneration.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index 43da93a..8dfebfd 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -343,7 +343,9 @@
 		rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 
 		rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
+		rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 1);
 		rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, conf->sync);
+		rt2x00_set_field16(&reg, TXRX_CSR19_TBCN, 1);
 		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
 	}