console: tty: Fix k_sem_take with wait time from ISR

Fix k_sem_take called with a timeout value other than K_NO_WAIT from
isr.
This happens when tty_irq_input_hook calls tty_putchar with the `~`
character to give the user a clue that input was lost.

This resulted in the following assert in sem.c:
	ASSERTION FAIL @ WEST_TOPDIR/zephyr/kernel/sem.c:140

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>