This patch add the 3G modem DWM-158 to the usb-serial option driver.
The DWM-158 is a pcie 3G modem. It is embedded in the DWR-512 modem
supportet by lede. The patch has been submitted and merged in the upstream
linux-next repository.
Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>