drm: xlnx: hdmi: Add FRL support in PIO interrupt handler

commit  9533b527bd9799dc64feddba388e19f0efe27bde from
https://github.com/Xilinx/linux-xlnx.git

 xlnx_rebase_v5.10

This patch adds support for FRL mode in PIO interrupt handler.

Signed-off-by: Venkateshwar Rao Gannavarapu <venkateshwar.rao.gannavarapu@xilinx.com>
State: pending
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>