ARM: renesas: Consistently enable ENV_OVERWRITE on Renesas R-Car

Move CONFIG_ENV_OVERWRITE=y into commont renesas_rcar.config to make sure
this configuration option is consistently enabled on all of Renesas R-Car
Gen2, Gen3, Gen4. Currently this option is not enabled on Gen4, this fix
corrects that omission.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
3 files changed