serial: 8250: Add UART_CAP_NOTEMT on PORT_16550A_FSL64

The Freescale variant of the 16550A doesn't have an interrupt on TEMT
available when using the FIFO mode.

Signed-off-by: Eric Tremblay <etremblay@distech-controls.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220330104642.229507-3-u.kleine-koenig@pengutronix.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>