firmware: arm_scmi: Perform earlier cinfo lookup call in do_xfer

Lookup cinfo data early in do_xfer so as to avoid any further init work
on xfer structure in case of error.

No functional change.

Link: https://lore.kernel.org/r/20211129191156.29322-2-cristian.marussi@arm.com


Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>