staging: rtl8723bs: provide spaces around unary operators

This patch fixes below issues reported by checkpatch

CHECK: spaces preferred around that '-' (ctx:VxV)
+ skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len,
rmem, len);

CHECK: spaces preferred around that '*' (ctx:VxV)
+#define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
^

CHECK: spaces preferred around that '/' (ctx:VxV)
+#define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
^
CHECK: spaces preferred around that '/' (ctx:VxV)
+ if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
^

Signed-off-by: Hariprasad Kelam <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8723bs/os_dep/xmit_linux.c

···
 	len = (rlen > len) ? len : rlen;
 
 	if (rmem)
-		skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
+		skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len, rmem, len);
 
 	pfile->cur_addr += len;
 	pfile->pkt_len -= len;
···
 		kfree(pxmitbuf->pallocated_buf);
 }
 
-#define WMM_XMIT_THRESHOLD	(NR_XMITFRAME*2/5)
+#define WMM_XMIT_THRESHOLD	(NR_XMITFRAME * 2 / 5)
 
 void rtw_os_pkt_complete(struct adapter *padapter, _pkt *pkt)
 {
···
 			#endif
 			)
 		&& padapter->registrypriv.wifi_spec == 0) {
-		if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
+		if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME / 4)) {
 			res = rtw_mlcst2unicst(padapter, pkt);
 			if (res)
 				goto exit;