arm64: zynqmp: Setup clock for DP and DPDMA

Clocks are coming from shared HW design where these frequencies should be
aligned with PLL setup.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/807e22371394222f728ff7d6b190a96a12145439.1683034376.git.michal.simek@amd.com