Extract firmware updates from Windows installer

In addition to the config files, the build process now also
extracts the firmware updates from the Windows installer image.

You can now upgrade to the latest firmware e.g. using:

 $ sudo ./em100 -F firmware/em100pro_fw_2.27_0.84_3.3V.dpfw

Change-Id: Iccb29e27fa074d8c92cc8c7c7dbc8bce2ca7bf09
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/22556
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
3 files changed