Skeleton smcCpuOff, fix building, fix smcConfigureCarveout

exosphere/src/warmboot_init.c

@@ -14,3 +14,7 @@ void invalidate_icache_all_tzram_pa(void) {
 uintptr_t get_warmboot_crt0_stack_address(void) {
     return TZRAM_GET_SEGMENT_ADDRESS(TZRAM_SEGMENT_ID_CORE3_STACK) + 0x800;
 }
+
+void warmboot_init(void) {
+    /* TODO: Implement. */
+}