Big code refactor, get rid of HAL entirely

kernel/diskpart/mbr.c

@@ -2,15 +2,14 @@
 #include <stdint.h>
 #include <stddef.h>
 #include "storedev/storedev.h"
-#include "mbr.h"
-#include "diskpart.h"
+#include "diskpart/mbr.h"
+#include "diskpart/diskpart.h"
 #include "compiler/attr.h"
-#include "errors.h"
-#include "kprintf.h"
-#include "hal/hal.h"
 #include "util/util.h"
 #include "dev/dev.h"
 #include "std/string.h"
+#include "errors.h"
+#include "kprintf.h"
 
 typedef struct {
   uint8_t driveattrs;