rt2x00: Don't enable short preamble for 1MBs

The timing settings for 1MBs should exclude
the short preamble bit since that only applies
to 2MBs, 5.5MBs and 11MBs.
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -363,7 +363,7 @@ static void rt2400pci_config_erp(struct rt2x00_dev *rt2x00dev,
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR2, &reg);
-	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble_mask);
+	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00);
 	rt2x00_set_field32(&reg, ARCSR2_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
 	rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -370,7 +370,7 @@ static void rt2500pci_config_erp(struct rt2x00_dev *rt2x00dev,
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR2, &reg);
-	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble_mask);
+	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00);
 	rt2x00_set_field32(&reg, ARCSR2_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
 	rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);