basic apic + fix some stupid issues

created an initial stub implementation of the apic driver, added the madt to acpi, fixed an issue with the strncmp, made the pmm set only free pages rather than used ones

src/include/string/strncmp.c

@@ -4,7 +4,7 @@ int strncmp(const char *a, const char *b, size_t c){
 
         int diff = 0;
 
-        while(c--)
+        while(c-- && diff == 0)
                 diff += *a++ - *b++;