ASoC: twl6040: VDDHF as SUPPLY widget

VDDHF external boost supply was being enabled after and disabled before
handsfree driver as a strategy for pop noise reduction. This strategy
makes handsfree driver very susceptible to overcurrent events, so the
boost supply is converted to a SUPPLY widget to enable it before and
disable it after handsfree path.

Change-Id: I608b4b0f5cb3301053869ccd2732434efe276b81
Signed-off-by: Misael Lopez Cruz <misael.lopez@ti.com>