configs: j7200_evm_a72: Enhance bootcmd to configure ethernet PHY

Update the default BOOTCOMMAND to provide an automatic and easier way
to configure ethernet PHY before loading the firmware.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
1 file changed