soc: qcom: Remove smp2p test support

Smp2p test code is used internally to test the
functionality of drivers and has no real use case
in end product.

CR-Fixed: 2328472
Change-Id: I4acd488ad2454b6a11e2f2a5cf3c98cef5c4dd12
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>