ARM: stm32: Define I2C EEPROM bus and address on DHCOM

Define I2C EEPROM bus and address, so that the 'eeprom' command uses
the correct ones and does not generate the following error:
    eeprom_rw_block: Cannot find udev for a bus 0

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/configs/stm32mp15_dhcom_basic_defconfig b/configs/stm32mp15_dhcom_basic_defconfig
index 12c4326..7638234 100644
--- a/configs/stm32mp15_dhcom_basic_defconfig
+++ b/configs/stm32mp15_dhcom_basic_defconfig
@@ -83,6 +83,8 @@
 CONFIG_DM_MAILBOX=y
 CONFIG_STM32_IPCC=y
 CONFIG_I2C_EEPROM=y
+CONFIG_SYS_I2C_EEPROM_ADDR=0x50
+CONFIG_SYS_I2C_EEPROM_BUS=3
 CONFIG_DM_MMC=y
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_STM32_SDMMC2=y