configs: am335x_evm: enable OF_BOARD_SETUP

Enable CONFIG_OF_BOARD_SETUP as it is needed for Beaglebone
black to overwrite the Ethernet phy address present in DT
in case the phy latches on to a different address.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

configs/am335x_evm_defconfig

@@ -5,6 +5,7 @@ CONFIG_AM33XX=y
 CONFIG_SPL=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SPL_LOAD_FIT=y
+CONFIG_OF_BOARD_SETUP=y
 CONFIG_BOOTCOMMAND="if test ${boot_fit} -eq 1; then run update_to_fit; fi; run findfdt; run init_console; run envboot; run distro_bootcmd"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y