staging: ccree: remove extraneous spin_unlock_bh() in error handler

An early error handler in send_request() tries to release a spinlock,
but the lock isn't acquired until the loop below it is entered.

Signed-off-by: Ian Chard <ian@chard.org>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>