meta-agl-bsp: meta-ti: append alsa-state with dra7xx-evm defaults

meta-agl-bsp: meta-ti: append alsa-state with dra7xx-evm defaults

The ALSA controls for the onboard tlv320aic3106 codec do not come
up with usable default settings for the dra7xx-evm analog audio
jacks. Add asound.state defaults for the dra7xx-evm baseboard
audio that properly configure the Line DACL1/R1 and PGA MicL1/R1
switches and accordingly gain levels such that the Line-Out and
Microphone jacks are functional by default.

Bug-AGL: SPEC-803

Change-Id: I6fe80daf1073c4d7c39be610dc99c136b4b3a82b
Signed-off-by: Matt Porter <mporter@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/10503
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Thomas Rini <trini@konsulko.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>