lib/fconf: Update 'set_fw_config_info' function

Updated the function 'set_fw_config_info' to make it generic
by doing below changes:

1. Rename function name from 'set_fw_config_info' to 'set_config_info'
2. Take image_id as an argument so that this function can set any
   config information.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Icf29e19d3e9996d8154d84dbbbc76712fab0f0c1
3 files changed