defconfig: arm64: msm: Enable ADSP RPC driver

Change enables ADSP RPC driver for msm platform.

Change-Id: I41a5f1a29705f12ef1b98011e9aacf25a077aab2
Acked-by: Sathish Ambley <sambley@qti.qualcomm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>