arm64/sysreg: Convert HFGITR_EL2 to automatic generation

Automatically generate the Hypervisor Fine-Grained Instruction Trap
Register as per DDI0601 2023-03, currently we only have a definition for
the register name not any of the contents.  No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230306-arm64-fgt-reg-gen-v5-1-516a89cb50f6@kernel.org


Signed-off-by: Will Deacon <will@kernel.org>