ieee802154: space prohibited before that close parenthesis

Fix checkpatch error with space.

Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ieee802154/wpan-class.c b/net/ieee802154/wpan-class.c
index ef56ab5..4dd3761 100644
--- a/net/ieee802154/wpan-class.c
+++ b/net/ieee802154/wpan-class.c
@@ -46,7 +46,7 @@
 MASTER_SHOW(current_page, "%d");
 MASTER_SHOW_COMPLEX(transmit_power, "%d +- %d dB",
 	((signed char) (phy->transmit_power << 2)) >> 2,
-	(phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1 );
+	(phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1);
 MASTER_SHOW(cca_mode, "%d");
 
 static ssize_t channels_supported_show(struct device *dev,