For backward compatibility reasons, PSCI maintains SMCCC version as
SMCCC didn't provide ARM_SMCCC_VERSION_FUNC_ID until v1.1.

PSCI initialises both the SMCCC version and conduit. Similar to the
conduit, let us provide accessors to fetch the SMCCC version also so
that other SMCCC v1.1+ features can use it.
Signed-off-by: NSudeep Holla <sudeep.holla@arm.com>
Tested-by: NEtienne Carriere <etienne.carriere@st.com>
Reviewed-by: NSteven Price <steven.price@arm.com>
Reviewed-by: NEtienne Carriere <etienne.carriere@st.com>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20200518091222.27467-7-sudeep.holla@arm.comSigned-off-by: NWill Deacon <will@kernel.org>