ASoC: Ensure output PGA is enabled for line outputs in wm_hubs

commit d0b48af6 upstream.

Also fix a left/right typo while we're at it.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>