arm64: xilinx: Remove multiple blank lines from DTSes

There is no reason to have multiple blank lines in DTS files that's why
remove them.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/6aaa9fa91c88ca3d3e5645d66a795ec09b8cec61.1704708642.git.michal.simek@amd.com