usb: host: ehci-tegra: Remove superfluous dev_err() message

The platform_get_irq() can print error message,so remove the redundant
dev_err() here.

Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200406055530.10860-1-tangbin@cmss.chinamobile.com


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