Revert "msm_ipc_router: also allow sensors group"

This reverts commit c7a316ec3b5eecbfbb2b1760b6e0f0832d856dc0.

Change-Id: If04a7a511913153261f1a7ce7abc50dcd046fc08
Merge "Revert "msm_ipc_router: also allow sensors group"" into kitkat