commit 80f13eef1595e1c3addbd61e007bf6bbc925b325
author Manish V Badarkhe <Manish.Badarkhe@arm.com> Thu Jul 23 20:23:01 2020 +0100
committer Manish V Badarkhe <Manish.Badarkhe@arm.com> Sun Jul 26 08:16:29 2020 +0100
tree d569ac8934992b6a18fdacfe44c6d57bc203dec8
parent 3074fa594c3a63be59d311726de5ba50f393653a

SMCCC: Introduce function to check SMCCC function availability

Currently, 'SMCCC_ARCH_FEATURES' SMC call handler unconditionally
returns 'SMC_OK' for 'SMCCC_ARCH_SOC_ID' function. This seems to
be not correct for the platform which doesn't implement soc-id
functionality i.e. functions to retrieve both soc-version and
soc-revision.
Hence introduced a platform function which will check whether SMCCC
feature is available for the platform.

Also, updated porting guide for the newly added platform function.

Change-Id: I389f0ef6b0837bb24c712aa995b7176117bc7961
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>