arm64/sysreg: Update HFGITR_EL2 definiton to DDI0601 2023-09

arm64/sysreg: Update HFGITR_EL2 definiton to DDI0601 2023-09

The 2023-09 release of the architecture XML (DDI0601) adds a new field
ATS1E1A to HFGITR_EL2, update our definition of the register to match.

This was extracted from Faud Tabba's patch "KVM: arm64: Add latest
HFGITR_EL2 FGT entries to nested virt"

[Extracted the sysreg definition from Faud's original patch and reword
 subject to match -- broonie]

Signed-off-by: Fuad Tabba <tabba@google.com>
Message-Id: <20231206100503.564090-4-tabba@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20231209-b4-arm64-sysreg-additions-v1-1-45284e538474@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>