Add a new macro MIPI_DSI_MSG_READ (bit 4) in drm_mipi_dsi.h for MIPI DSI READ Message Change-Id: I8d6ed4aa10b915f7ff74339c8bdabe061c09ecd5 Signed-off-by: Bang Nguyen <bangnguyen@motorola.com> Reviewed-on: https://gerrit.mot.com/1697680 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Shuo Yan <shuoyan@motorola.com> Reviewed-by: Guobin Zhang <zhanggb@motorola.com> Submit-Approved: Jira Key