Revert "ARM: dts: imx6qdl-wandboard: Fix audio channel swap"

This reverts commit c53c4ad9 which was
commit 79935915300c5eb88a0e94fa9148a7505c14a02a upstream.

As Ben points out:
	This depends on:

	commit 570c70a60f53ca737ead4e5966c446bf0d39fac9
	Author: Fabio Estevam <fabio.estevam@nxp.com>
	Date:   Wed Apr 5 11:32:34 2017 -0300

	    ASoC: sgtl5000: Allow LRCLK pad drive strength to be changed

which did not show up until 4.13, so this makes no sense to have in this
stable branch.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>