include: sbi_platform: Combine reboot and shutdown into one callback

We can achieve shutdown, cold reboot, and warm reboot using just
one sbi_platform callback so we combine system_reboot() and
system_shutdown() callbacks into one system_reset() callback.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>

lib/utils/sys/htif.c

@@ -140,7 +140,7 @@ int htif_getc(void)
 	return ch - 1;
 }
 
-int htif_system_down(u32 type)
+int htif_system_reset(u32 type)
 {
 	while (1) {
 		fromhost = 0;