arm64: zynqmp: Add u-boot,dm-pre-reloc to dpsub node

u-boot,dm-pre-reloc is necessary for DP driver to allocate enough space for
framebuffer before relocation.
Power domain driver is called when video console is used for example by
loading BMP image.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/5e93acee1746913a6e42741e5e797f0b4ab98d44.1637239230.git.michal.simek@xilinx.com
1 file changed