Documentation/arm64: Fix typos in elf_hwcaps

Small typos in register and field names.

Signed-off-by: Marielle Novastrider <marielle@novastrider.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20231031200838.55569-1-marielle@novastrider.com


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