defconfig: msm8974: Add support for msmsamarium sound

Add support for msmsamarium sound and wcd9306 codec
in the msm8974 defconfig. Msmsamarium will be built
in the same image as msm8974.

Change-Id: I8ebb3f435567ee547faccba675ec4fb766e39ae6
Signed-off-by: Damir Didjusto <damird@codeaurora.org>