Revert "Add metadata_op_wb_secure to switch-case [TEST]"

This reverts commit c016f771b5b7f11f398532b6d8adb4170d93e4d8.
Revert "msm_mdp.h: secure_en defn to msm_metadata stuct"

This reverts commit 7d1f2f64ec10c5cb34b17f152c0e4471b61460e0.
Revert "Define metadata_op_wb_secure [TEST2]"

This reverts commit 82dba16db8282a631988c61919a452897b85448d.
Revert "Add metadata_op_wb_secure to switch-case [TEST3]"

This reverts commit b1674d64406b744ec27a4693c148386f36fa198d.
msm: mdss: Add support to get/set secure flag via an ioctl

Add support to get/set secure flag for WB session through an ioctl.
This is required for WB clients such as AD/WFD, enabling them to modify
or query the secure flag depending on requirements e.g. secure video
playback when using AD.