Remove support for the HTC-specific "firmware" update command and the
corresponding edify function write_firmware_update(). This
functionality is now done by an edify extension library that lives in
vendor/htc.
Change-Id: I80858951ff10ed8dfff98aefb796bef009e05efb
gcc 4.4 complains about some of the recovery ui functions not being
declared. To include the header, we have to fix the 'volatile'
declaration (otherwise there's a compiler error).
Move the dream-specific images to vendor/htc/dream, make the default
images a generic phone.
