mailbox: bcm-pdc: Remove redundant error printing in pdc_probe()

When devm_ioremap_resource() fails, a clear enough error message will be
printed by its subfunction __devm_ioremap_resource(). The error
information contains the device name, failure cause, and possibly resource
information.

Therefore, remove the error printing here to simplify code and reduce the
binary size.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NJassi Brar <jaswinder.singh@linaro.org>

drivers/mailbox/bcm-pdc-mailbox.c

@@ -1577,7 +1577,6 @@ static int pdc_probe(struct platform_device *pdev)
 	pdcs->pdc_reg_vbase = devm_ioremap_resource(&pdev->dev, pdc_regs);
 	if (IS_ERR(pdcs->pdc_reg_vbase)) {
 		err = PTR_ERR(pdcs->pdc_reg_vbase);
-		dev_err(&pdev->dev, "Failed to map registers: %d\n", err);
 		goto cleanup_ring_pool;
 	}