arm/dt: msm8974: support amplifier for speaker path
In Liquid 8974, the speaker path is intended for the ultrasound emitter.
Update audio routing node and configure speaker amplifier
gpio to support ultrasound.
Signed-off-by:
Baruch Eruchimovitch <baruche@codeaurora.org>
Change-Id: I3f40738652d5fc6b6e67e9fb028139907683fd48
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