drivers/tty: serial: remove info message

Unacceptable levels of debug info will happen when the DMA driver defined in
the DT/ACPI is a blacklisted module.

Another cause for log polution would be the defer probing of the DMA driver
taking too long - in which case the message that this commit removes would be
cluttering the logs due to the init daemons activity.
Signed-off-by: NJorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/amba-pl011.c

@@ -284,7 +284,6 @@ static void pl011_dma_probe(struct uart_amba_port *uap)
 	chan = dma_request_slave_channel_reason(dev, "tx");
 	if (IS_ERR(chan)) {
 		if (PTR_ERR(chan) == -EPROBE_DEFER) {
-			dev_info(uap->port.dev, "DMA driver not ready\n");
 			uap->dma_probed = false;
 			return;
 		}