Revert "msm_fb: display: Wait for external vsync before DTV IOMMU unmap"

This reverts commit 1c8cfbe03ce74d6179a337a5ef416ac234f7a87f.
Revert "msm_fb: Display: Add additional settings to improve DSI signal strength."

This reverts commit 0c097dcb4dc4ea0e3c09ffc2db2850b3a38f7195.
Revert "msm_fb: display: Free staged foreground pipes during suspend"

This reverts commit 5b24bcce8b9bcef1a8a52b399f4ddc3ae7dc2be4.