kbd: drop _KERNEL #ifdef in kbdreg.h

This #ifdef is misleading as there are actually no user-serviceable parts
inside and, as far as I can tell, there is no pollution leading from
userland to this header. Furthermore, it becomes a slight nuisance when
attempting to move things around in this header.

sys/dev/kbd/kbdreg.h

@@ -215,8 +215,6 @@ typedef struct keyboard_driver {
     int			(*configure)(int); /* backdoor for the console driver */
 } keyboard_driver_t;
 
-#ifdef _KERNEL
-
 #define KEYBOARD_DRIVER(name, sw, config)		\
 	static struct keyboard_driver name##_kbd_driver = { \
 		{ NULL }, #name, &sw, config		\
@@ -308,6 +306,4 @@ int 	genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg);
 int 	genkbd_keyaction(keyboard_t *kbd, int keycode, int up,
 			 int *shiftstate, int *accents);
 
-#endif /* _KERNEL */
-
 #endif /* !_DEV_KBD_KBDREG_H_ */