tegra: dc: ext: Add TEGRA_DC_EXT_FLIP4 support

tegra: dc: ext: Add TEGRA_DC_EXT_FLIP4 support

Add FLIP4 support for the follwing reasons:
1. Cuurent FLIP3 doesn't have enough space in
order to pass head-specific info.
2. In order to pass HDR metadata we need at least
26 bytes and the current FLIP3 doesn't support
that.

The new FLIP4 has
1. A pointer to a array of 32 bytes of data to
pass head-specific info.
2. A nr_elements variabel that indicates the no.
of elements in the above array.

A new "tegra_dc_ext_flip_user_data" is defined
that has 6 bytes of tag info and 26 bytes of
payload data.

Bug 200122117

Change-Id: I4831b89ec25f877a948406feb4589824e82e3f3e
Reviewed-on: http://git-master/r/803991
(cherry picked from commit 83f6cd1eaebf1384c95a48069807407fb7beccf2)
Signed-off-by: Arun Swain <arswain@nvidia.com>
Reviewed-on: http://git-master/r/821188
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Mitch Luban <mluban@nvidia.com>
GVS: Gerrit_Virtual_Submit