docs/arm64: elf_hwcaps: unify newlines in HWCAP lists

Unify horizontal spacing (remove extra newlines) which
are sensitive to visual presentation by Sphinx.

Fixes: 5e64b862 ("arm64/sme: Basic enumeration support")
Signed-off-by: Martin Liska <mliska@suse.cz>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/84e3d6cc-75cf-d6f3-9bb8-be02075aaf6d@suse.cz


Signed-off-by: Will Deacon <will@kernel.org>