5cc25cff5d
Create a helper function to eliminate direct feature register reading, which gets messy in code shared between ARM/AArch64. Returns BOOLEAN True if the CPU implements the GIC System Register Interface (any version), otherwise returns BOOL False. Cc: Ard Biesheuvel <ard.biesheuvel@arm.com> Signed-off-by: Leif Lindholm <leif@nuviainc.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>