Fix warmboot vs cpu_on check

exosphere/src/warmboot_init.c

@@ -143,7 +143,7 @@ void warmboot_init(boot_func_list_t *func_list) {
     func_list->funcs.invalidate_icache_all();
 
     /* On warmboot (not cpu_on) only */
-    if (MC_SECURITY_CFG0_0 != 0) {
+    if (MC_SECURITY_CFG3_0 == 0) {
         init_dma_controllers();
     }