staging: unisys: iochannel fix spacing around operators

This patch fixes check warning from checkpatch.pl in the macro definition
CHECK: spaces preferred around that '+' (ctx:VxV)
Signed-off-by: NErik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: NBenjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/include/iochannel.h

@@ -366,7 +366,8 @@ struct net_pkt_xmtdone {
  */
 #define RCVPOST_BUF_SIZE 4032
 #define MAX_NET_RCV_CHAIN \
-	((ETH_MAX_MTU+ETH_HEADER_SIZE + RCVPOST_BUF_SIZE-1) / RCVPOST_BUF_SIZE)
+	((ETH_MAX_MTU + ETH_HEADER_SIZE + RCVPOST_BUF_SIZE - 1) \
+	/ RCVPOST_BUF_SIZE)
 
 struct net_pkt_rcvpost {
 	    /* rcv buf size must be large enough to include ethernet data len +