staging: rtl8712: remove trailing whitespace

Fix the following checkpatch.pl error:

ERROR: trailing whitespace
Signed-off-by: Felix Yan <felixonmars@archlinux.org>
Link: https://lore.kernel.org/r/20240730063746.176245-1-felixonmars@archlinux.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_cmd.h

@@ -736,7 +736,7 @@ void r8712_getbbrfreg_cmdrsp_callback(struct _adapter *padapter, struct cmd_obj
 void r8712_readtssi_cmdrsp_callback(struct _adapter *padapter, struct cmd_obj *pcmd);
 void r8712_setstaKey_cmdrsp_callback(struct _adapter  *padapter, struct cmd_obj *pcmd);
 void r8712_setassocsta_cmdrsp_callback(struct _adapter  *padapter, struct cmd_obj *pcmd);
-void r8712_disconnectCtrlEx_cmd(struct _adapter *adapter, u32 enableDrvCtrl, u32 tryPktCnt, 
+void r8712_disconnectCtrlEx_cmd(struct _adapter *adapter, u32 enableDrvCtrl, u32 tryPktCnt,
 				u32 tryPktInterval, u32 firstStageTO);
 
 struct _cmd_callback {