msm/dsi: create debug node for dynamic elvss

The debug node of dynamic elvss. This is for
debugging purpose during the development stage.

Bug: 170783990
Test:
1. Enable/Disable dynamic elvss and read register.
"echo 1 > d/qcom,mdss_dsi_sofef01_sdc_fhd_plus_cmd/
enable_dynamic_elvss"
2. Run over 3000 times by script

Change-Id: I9e55274f1a02109bdbe02b9eb8eb806fd3244f08
Signed-off-by: Lopy Cheng <lopycheng@google.com>
3 files changed
tree: da08d4a646f169b4d8940798b4979138893f6e8d
  1. config/
  2. msm/
  3. pll/
  4. rotator/
  5. Makefile
  6. NOTICE