UPSTREAM: firmware: arm_ffa: Handle compatibility with different firmware versions

The driver currently just support v1.0 of Arm FFA specification. It also
expects the firmware implementation to match the same and bail out if it
doesn't match. This is causing issue when running with higher version of
firmware implementation(e.g. v1.1 which will released soon).

In order to support compatibility with different firmware versions, let
us add additional checks and find the compatible version the driver can
work with.

Link: https://lore.kernel.org/r/20211013091127.990992-1-sudeep.holla@arm.com


Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
(cherry picked from commit 8e3f9da6)
Change-Id: I7bc9a3b172a9067bfd4e9bb9d50b4729e915b5a5
Bug: 168585974
Signed-off-by: Will Deacon <willdeacon@google.com>