staging: dgrp: dgrp_tty.c: Remove the TIOCSSOFTCAR ioctl handler from dgrp driver

Remove the TIOCSSOFTCAR ioctl handler from dgrp driver and let the core tty
layer to take care of this ioctl instead.
Signed-off-by: NKumar Amit Mehta <gmate.amit@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgrp/dgrp_tty.c

@@ -2623,13 +2623,6 @@ static int dgrp_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
 		put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) arg);
 		return 0;
 
-	case TIOCSSOFTCAR:
-		get_user(arg, (unsigned long __user *) arg);
-		tty->termios.c_cflag =
-			((tty->termios.c_cflag & ~CLOCAL) |
-			 (arg ? CLOCAL : 0));
-		return 0;
-
 	case TIOCMGET:
 		rc = access_ok(VERIFY_WRITE, (void __user *) arg,
 				 sizeof(unsigned int));