xilinx: zynqmp: Disable various configs for mini U-Boot

With 2022.01-rc3 upgrade, the size of the mini U-Boot increased and is
not able to fit in OCM. Hence disable unnecessary configs and make room.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/306b57818601fa3571bc75c4182f25aaa3f2a793.1659691195.git.michal.simek@amd.com