Staging: sb105x: info leak in mp_get_count()

The icount.reserved[] array isn't initialized so it leaks stack
information to userspace.

Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
static unsigned int multi_tx_empty(struct sb_uart_port *port)
{
	struct mp_port *mtpt = (struct mp_port *)port;
	unsigned long flags;
	unsigned int ret;

	spin_lock_irqsave(&mtpt->port.lock, flags);
	ret = serial_in(mtpt, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
	spin_unlock_irqrestore(&mtpt->port.lock, flags);

	return ret;
}

static unsigned int multi_tx_empty(struct sb_uart_port *port)
{
	struct mp_port *mtpt = (struct mp_port *)port;
	unsigned long flags;
	unsigned int ret;

	spin_lock_irqsave(&mtpt->port.lock, flags);
	ret = serial_in(mtpt, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
	spin_unlock_irqrestore(&mtpt->port.lock, flags);

	return ret;
}
