firmware: arm_scmi: Relax base protocol sanity checks on the protocol list

firmware: arm_scmi: Relax base protocol sanity checks on the protocol list

Even though malformed replies from firmware must be treated carefully to
avoid memory corruption in the kernel, some out-of-spec SCMI replies can
be tolerated to avoid breaking existing deployed system, as long as they
won't cause memory issues.

Relax the sanity checks on the recieved protocol list in the base protocol
to avoid breaking one of the deployed platform whose firmware is not easily
upgradable currently.

Link: https://lore.kernel.org/r/20220523171559.472112-1-cristian.marussi@arm.com
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reported-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Tested-By: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Michael Riesch <michael.riesch@wolfvision.net>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>