board: apalis-imx8: add reset code

With commit 922d4504bc ("imx: scu_api: update to version 1.16 and
add more APIs") added the reboot API.

Add the board code to use that.

Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

board/toradex/apalis-imx8/apalis-imx8.c

@@ -290,6 +290,14 @@ int board_init(void)
 	return 0;
 }
 
+void reset_cpu(void)
+{
+	sc_pm_reboot(-1, SC_PM_RESET_TYPE_COLD);
+
+	do {
+	} while (1);
+}
+
 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 int ft_board_setup(void *blob, struct bd_info *bd)
 {