arm64: dts: zynqmp: Fix u48 si5382 chip on zcu111

u48 chip on zcu111 is si5382 not si5328.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/cefda1a894fb54059aa1b018e4ecad0eb36fdc9d.1611224800.git.michal.simek@xilinx.com