platform: tegra: add new panel_cy8c param

platform: tegra: add new panel_cy8c param

Add "max-xfer-sz" parameter for the panel_cy8c driver.
This parameter indicates the maximum I2C chunk size based
on the platform's SoC and cy8cxxx microcontroller capabilities.

Bug 1679724

Change-Id: I2ed63f4c7f8e8aa8f3ab1530693af281c170d9c1
Signed-off-by: Daniel Solomon <daniels@nvidia.com>
Reviewed-on: http://git-master/r/819305
(cherry picked from commit 7ea81eaa71e0ac2b947aa1c64a5b4868d2533ba2)
Reviewed-on: http://git-master/r/825777
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Reviewed-by: Aly Hirani <ahirani@nvidia.com>