staging: rtl8712: Remove space after a cast.

This patch fixes the following checkpatch issue:

CHECK: No space is necessary after a cast
Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/os_intfs.c

@@ -164,7 +164,7 @@ static void loadparam(struct _adapter *padapter, struct  net_device *pnetdev)
 	registry_par->ampdu_enable = (u8)ampdu_enable;
 	registry_par->rf_config = (u8)rf_config;
 	registry_par->low_power = (u8)low_power;
-	registry_par->wifi_test = (u8) wifi_test;
+	registry_par->wifi_test = (u8)wifi_test;
 	r8712_initmac = initmac;
 }