drm/msm: Don't dump RBBM_SECVID_TSB_CNTL

This register is not accessible by CPU for certain TZ, trying to read it
will cause CPU hang.

Change-Id: Ica1b18db2c3cc2c9bacfdbd4c5eb1e2e172ade33
Signed-off-by: Kasin Li <donglil@codeaurora.org>