[MIPS] Fix ip27 build.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/sgi-ip27/ip27-timer.c

@@ -122,7 +122,7 @@ again:
 	    xtime.tv_sec > last_rtc_update + 660 &&
 	    (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
 	    (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
-		if (rtc_set_time(xtime.tv_sec) == 0) {
+		if (rtc_mips_set_time(xtime.tv_sec) == 0) {
 			last_rtc_update = xtime.tv_sec;
 		} else {
 			last_rtc_update = xtime.tv_sec - 600;