firmware files for Multitech MT9234MU and MT9234ZBA modems

The following patch contains firmware for Multitech Systems' MT9234MU
and MT9234ZBA usb dialup fax modems. It has been provided to me by
Multitech Systems' support, and I converted the files to ihex format with
objcopy -I binary -O ihex <file.fw> <file.fw>.ihex

Signed-off-by: Alex Manoussakis <alex@juniper.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>