Both Gumstix Overo and Overo Storm COMs use TWL4030 audio module
connected to the McBSP2.  As such, enable the McBSP2 module in the
common device tree file, omap3-overo-base.dtsi, rather than in the
processor-specific device tree files, omap3-overo.dtsi and
omap3-overo-storm.dtsi.  This corrects audio on the Storm COMs where
the setting was accidentally missing from the device tree.
Signed-off-by: Ash Charles <ashcharles@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>