spi/bitbang: avoid needless loop flow manipulations

This patch makes a loop look cleaner by replacing a "break" and a "continue"
in its body by a single "if".
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

drivers/spi/spi-bitbang.c

@@ -346,11 +346,7 @@ static void bitbang_work(struct work_struct *work)
 			if (t->delay_usecs)
 				udelay(t->delay_usecs);
 
-			if (!cs_change)
-				continue;
-			if (t->transfer_list.next == &m->transfers)
-				break;
-
+			if (cs_change && !list_is_last(&t->transfer_list, &m->transfers)) {
 				/* sometimes a short mid-message deselect of the chip
 				 * may be needed to terminate a mode or command
 				 */
@@ -358,6 +354,7 @@ static void bitbang_work(struct work_struct *work)
 				bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
 				ndelay(nsecs);
 			}
+		}
 
 		m->status = status;
 		m->complete(m->context);