change pointers used in function calls

change from void* to cls_t* as it makes more sense to be this way

src/arch/x86_64/cls.c

@@ -5,12 +5,12 @@
 cls_t bspcls;
 
 
-void arch_setcls(void* addr){
+void arch_setcls(cls_t* addr){
 	wrmsr(MSR_GSBASE, (uint64_t)addr);
 }
 
-void* arch_getcls(){
-	return (void*)rdmsr(MSR_GSBASE);
+cls_t* arch_getcls(){
+	return (cls_t*)rdmsr(MSR_GSBASE);
 }
 
 void bsp_setcls(){