ARM: renesas: Align env eMMC device number with Linux 6.5.3 DT changes on R-Car Gen3 Salvator-X

Set U-Boot environment storage eMMC device number to 0, to match
the new additions to DT /aliases node pulled in alongside Linux
6.5.3 DT synchronization.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/configs/rcar3_salvator-x_defconfig b/configs/rcar3_salvator-x_defconfig
index 6aaf24e..0292424 100644
--- a/configs/rcar3_salvator-x_defconfig
+++ b/configs/rcar3_salvator-x_defconfig
@@ -58,7 +58,6 @@
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_SYS_MMC_ENV_DEV=1
 CONFIG_SYS_MMC_ENV_PART=2
 CONFIG_VERSION_VARIABLE=y
 CONFIG_REGMAP=y