arm64: soc: ZynqMP SoC changes for v5.12

- Enable clock driver for ZynqMP in defconfig

* tag 'zynqmp-soc-for-v5.12' of https://github.com/Xilinx/linux-xlnx:
  arm64: defconfig: enable clock driver for ZynqMP platforms

Link: https://lore.kernel.org/r/2b0f6314-13ba-375a-9231-925b0a07be82@monstr.euSigned-off-by: Arnd Bergmann <arnd@arndb.de>