Unify the arch_regs structs

I was doing something stupid and keeping a separate version for the cpu registers. oh well, I fixed it now

src/arch/x86_64/panic.c

@@ -18,7 +18,7 @@ static void tracestack(uint64_t** addr){
 	}
 }
 
-__attribute((noreturn)) void _panic(char* reason, arch_regserror *reg){
+__attribute((noreturn)) void _panic(char* reason, arch_regs *reg){
 	
 	printf("PANIC: %s.\n", reason);