arm64/sme: Automatically generate defines for SMCR

Convert SMCR to use the register definition code, no functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220510161208.631259-8-broonie@kernel.org


Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>