Revert "msm: vidc: set ctrl to request sequence header for encoder"

This reverts commit c04a870f55bbcf967e5fa39eb9a25004676dfddf.
Revert "msm: vidc: Query the core on VIDIOC_G_FMT"

This reverts commit 85663d14c0126d8fa27ee62125d03e2dcd47535d.