arm64: zynqmp: Reduce console buffer size

Reduce console buffer size to 1kbyte to accommodate memory
allocations in mini u-boot for zynqmp.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
1 file changed