reset: Convert individual boards to `board_reset()`

Change-Id: I6182da172ae2f4107a9b5d8190e4b3b10ed2f0b9
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/29048
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/src/mainboard/google/nyan_big/romstage.c b/src/mainboard/google/nyan_big/romstage.c
index 4ec0164..b96917e 100644
--- a/src/mainboard/google/nyan_big/romstage.c
+++ b/src/mainboard/google/nyan_big/romstage.c
@@ -76,7 +76,7 @@
 	 */
 	if (power_reset_status() == POWER_RESET_WATCHDOG) {
 		printk(BIOS_INFO, "Watchdog reset detected, rebooting.\n");
-		hard_reset();
+		board_reset();
 	}
 
 	/* FIXME: this may require coordination with moving timestamps */