rt2800usb: Add new rt2800usb device PLANEX GW-USMicroN

This patch add a device ID for PLANEX GW-USMicroN.
Without this patch, I had to echo the device IDs in order to
recognize the device.

# lsusb |grep PLANEX
Bus 002 Device 005: ID 2019:ed14 PLANEX GW-USMicroN

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>