arm64: zynqmp: Define label for flash node

Define a label for flash node so that it can be
referenced easily as required.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
1 file changed