Replace X-allocation functions with their C89 counterparts

The only remaining X-functions used in server are XNF*, the rest is converted to
plain alloc/calloc/realloc/free/strdup.

X* functions are still exported from server and x* macros are still defined in
header file, so both ABI and API are not affected by this change.

Signed-off-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

hw/kdrive/linux/keyboard.c

@@ -737,9 +737,9 @@ LinuxKeyboardInit (KdKeyboardInfo *ki)
     if (!ki)
         return !Success;
 
-    xfree(ki->path);
+    free(ki->path);
     ki->path = strdup("console");
-    xfree(ki->name);
+    free(ki->name);
     ki->name = strdup("Linux console keyboard");
 
     readKernelMapping (ki);