ARM: dts: apq: Removed not needed property for DB8096

DB8096 doesn't contains Bongo PAs for speakers. The last changes in
the audio driver machine added the Bongo as optional. Therefore
we don't need the creation of the sound card without Bongo PAs.

Change-Id: Ibca8ef1b09bc86614e449db9d51ac6917e5b9105
Signed-off-by: Tanya Finkel <tfinkel@codeaurora.org>