firmware: arm_ffa: Handle partitions setup failures

Make ffa_setup_partitions() fail, cleanup and return an error when the Host
partition setup fails: in such a case ffa_init() itself will fail.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20240108-ffa_fixes_6-8-v1-6-75bf7035bc50@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>