uboot-imx

ARM64: zynqmp: Dont use shortcut for setenv

Dont use shortcut command for setenv as
it wont work now due introduction of new
command setexpr.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>