kselftest/arm64: Add missing newline to SVE test skipping output

The newline is expected to come from the caller but got missed for this
test.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210518163331.38268-1-broonie@kernel.org


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