ARM: dts: msm: Change audio property from bool type to u32

Device tree overlay does not support /delete-property/. So,
it is difficult to delete a property of type bool in device
tree overlay. Change the property to u32 type and control
the property based on the value.

Change-Id: I18da82ee7ae479e08118b7a03693a18c33e490df
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>