[PATCH V6] drm: edid: add support for E-DDC

[Shirish S]

This patch adds support in probing 4 block edid data, for E-DDC.
This is the first test case in CTS, for HDMI compliance.

Changes from V1:
1. Data type of offset adress updated to unsigned short
2. Updated the buf feild of msg[0]

Changes from V2:
Add switch for DDC and E-DDC

Changes from V3:
Remove switch,and avoid sending of segment data for non E-DDC

Changes from V4:
Fix review comments about space and comment indentation.

Changes from V5:
Compacted the code.

Based on drm-next branch

Shirish S (1):
  drm: edid: add support for E-DDC

 drivers/gpu/drm/drm_edid.c |   19 ++++++++++++++++---
 1 files changed, 16 insertions(+), 3 deletions(-)