arm64/sysreg: Add BRBE registers and fields

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8EC9K
CVE: NA

Reference: https://lore.kernel.org/lkml/20230711082455.215983-3-anshuman.khandual@arm.com/



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This adds BRBE related register definitions and various other related field
macros there in. These will be used subsequently in a BRBE driver which is
being added later on.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Junhao He <hejunhao3@huawei.com>