Staging: gdm72xx: Remove unnecessary parenthesis around function pointer

No need for the parentheses around any function pointer.
Detected using checkpatch.
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm72xx/gdm_wimax.c

@@ -26,11 +26,11 @@
 #include "netlink_k.h"
 
 #define gdm_wimax_send(n, d, l)	\
-	(n->phy_dev->send_func)(n->phy_dev->priv_dev, d, l, NULL, NULL)
+	n->phy_dev->send_func(n->phy_dev->priv_dev, d, l, NULL, NULL)
 #define gdm_wimax_send_with_cb(n, d, l, c, b)	\
-	(n->phy_dev->send_func)(n->phy_dev->priv_dev, d, l, c, b)
+	n->phy_dev->send_func(n->phy_dev->priv_dev, d, l, c, b)
 #define gdm_wimax_rcv_with_cb(n, c, b)	\
-	(n->phy_dev->rcv_func)(n->phy_dev->priv_dev, c, b)
+	n->phy_dev->rcv_func(n->phy_dev->priv_dev, c, b)
 
 #define EVT_MAX_SIZE	2048