arm64: tools: Add __ASM_CPUCAPS_H to the endif in cpucaps.h

Anshuman suggested this.

Suggested-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210513151819.12526-1-broonie@kernel.org


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