Kernel: Make ioctl take unsigned long instead of int

this is what linux does :D

also fix one or two `return ioctl` instead of `return ioctl_impl`

userspace/libraries/LibC/include/sys/ioctl.h

@@ -82,7 +82,7 @@ struct fb_msync_region
 };
 #define FB_MSYNC_RECTANGLE 90 /* msync a rectangular area in mmap'd framebuffer device */
 
-int ioctl(int, int, ...);
+int ioctl(int, unsigned long, ...);
 
 __END_DECLS