iw: scan: fixup HE caps whitespace

iw: scan: fixup HE caps whitespace

For scans, it's nicer to drop an indentation level, because we don't
have the "interface type" section that we do in the phy-info version.

The NSS print also had an extra level of indentation, and a spare
leading space, which made it a bit inconsistent with other sections.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20201118033936.3667788-5-briannorris@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>