serial: uartps: Fix error path when alloc failed

When cdns_uart_console allocation failed there is a need to also clear
ID from ID list.

Fixes: ae1cca3f ("serial: uartps: Change uart ID port allocation")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>