Platforms where ARM Trusted Firmware is the first stage bootloader are
converging to use FIP as bundle format for further firmware including
trusted OS and non secure bootloader. Teach genimage to call fiptool to
generate FIP images. The config options currently supported by genimage
for fip { } nodes are those needed to boot the STM32MP1. The extraargs
config option can be used to add further options as a stop-gap until
genimage is extended as necessary.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>