defconfig: msm8909: adding audio flags in perf_defconfig

Adding audio flags in the msm8909-perf_defconfig to
add machine, codec and slimbus driver as part of
perf image.

CRs-Fixed: 1105593
Change-Id: I3fe1933346ba03c9e27f4cec5315bffa266a0900
Signed-off-by: Surendar karka <sukark@codeaurora.org>