arm: mach-k3: Add platform data for j721e and j7200

Add platform clock and powerdomain data for J721e and J7200. This data
is used by the corresponding drivers to register all the required device
clocks and powerdomains.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tero Kristo <kristo@kernel.org>