Minor optimization in OpenWatcom DOS builds

Co-authored-by: jmalak <jmalak@users.noreply.github.com>

src/dos/dosutil.c

@@ -53,16 +53,6 @@ int dpmi_unlock_linear_region_base(void *address, unsigned long size) {
 
 #include <i86.h>
 
-int enable() {
-	_enable();
-	return 1;
-}
-
-int disable() {
-	_disable();
-	return 1;
-}
-
 int dpmi_allocate_dos_memory(int paragraphs, int *ret_selector_or_max) {
 	union REGS r;
 

src/dos/dosutil.h

@@ -18,6 +18,9 @@ extern int dpmi_unlock_linear_region_base(void *address, unsigned long size);
 
 extern int enable();
 extern int disable();
+#pragma aux enable = "sti" "mov eax,1"
+#pragma aux disable = "cli" "mov eax,1"
+
 #else
 #include <pc.h>
 #endif