tty: Restore locked termios with usernsd call
tty: Restore locked termios with usernsd call

Locked termios require global CAP_SYS_ADMIN. But let's
restore everything for tty in one call since regular
termios depend on locked and it's not nice to do sync
usernsd call for locked only.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>
Acked-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@parallels.com>

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