vt: keyboard, make use of assign_bit() API

We have for some time the assign_bit() API to replace open coded

if (foo)
set_bit(n, bar);
else
clear_bit(n, bar);

Use this API in VT keyboard library code.

Acked-by: Jiri Slaby <[e-mail]>
Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/vt/keyboard.c

···
 		raw_mode = true;
 	}
 
-	if (down)
-		set_bit(keycode, key_down);
-	else
-		clear_bit(keycode, key_down);
+	assign_bit(keycode, key_down, down);
 
 	if (rep &&
 	    (!vc_kbd_mode(kbd, VC_REPEAT) ||