[FREELDR] Use the OFF(x) macro on realmode assembly files

Author: iLauncherDev

boot/freeldr/freeldr/arch/realmode/amd64.S

@@ -116,11 +116,7 @@ gdt:
 /* GDT table pointer */
 gdtptr:
     .word HEX(37)       /* Limit */
-#ifdef _USE_ML
-    .long offset gdt    /* Base Address */
-#else
-    .long gdt           /* Base Address */
-#endif
+    .long OFF(gdt)      /* Base Address */
 
 
 CheckFor64BitSupport:

boot/freeldr/freeldr/arch/realmode/i386.S

@@ -191,7 +191,7 @@ gdt:
 /* GDT table pointer */
 gdtptr:
     .word HEX(27)       /* Limit */
-    .word gdt, 0        /* Base Address */
+    .long OFF(gdt)      /* Base Address */
 
 /* Real-mode IDT pointer */
 rmode_idtptr: