arm64: a37xx: Remove DM_I2C_COMPAT from the board config

Remove DM_I2C_COMPAT from the board configurations for
Armada 37xx platform boards for supressing the buid tim
warning.

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Igal Liberman <igall@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>

configs/mvebu_db-88f3720_defconfig

@@ -38,7 +38,6 @@ CONFIG_SHA1=y
 CONFIG_SHA256=y
 CONFIG_BLOCK_CACHE=y
 CONFIG_DM_I2C=y
-CONFIG_DM_I2C_COMPAT=y
 CONFIG_MISC=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y

configs/mvebu_espressobin-88f3720_defconfig

@@ -38,7 +38,6 @@ CONFIG_SHA1=y
 CONFIG_SHA256=y
 CONFIG_BLOCK_CACHE=y
 CONFIG_DM_I2C=y
-CONFIG_DM_I2C_COMPAT=y
 CONFIG_MISC=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y