dsp: Disable q6_pdr build for msm8937 and msm8953

Disable compilation of q6_pdr module for msm8937
and msm8953 SPF targets as it is not supported and also
results in secondary images build error.

Change-Id: I9590ddfdfb51c35744d4cb8e2a108f5f5449864f
Signed-off-by: Subhadra Jagadeesan <subhja@codeaurora.org>