sdm: Remove null commits used for obtaining topology

Driver exports per mode topology and panel params which obviates
the need for null commits after crtc->connector chain setup or
mode switch. Remove null commits for all display types.

Revert "sdm: Fix topology after adding new mode"
This reverts commit 5014f0eb03cc37419590c1a59433689f29fa9cb2.

Change-Id: Ib68c5b2e2ff475250b7251822515e51fb7b31869
CRs-fixed: 2138173
9 files changed