configs: stm32mp1: enable the fastboot oem command bootbus

Enable the fastboot oem command bootbus, used to configure the eMMC
boot behavior, with same format than 'mmc bootbus'
and with parameter: boot_bus_width reset_boot_bus_width boot_mode

On stm32mp1 boards the expected command is
$> fastboot oem partconf:0 0 0

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index 836bcee..def6a51 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -86,6 +86,7 @@
 CONFIG_FASTBOOT_MMC_USER_NAME="mmc1"
 CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
 CONFIG_FASTBOOT_CMD_OEM_PARTCONF=y
+CONFIG_FASTBOOT_CMD_OEM_BOOTBUS=y
 CONFIG_GPIO_HOG=y
 CONFIG_DM_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_STM32=y
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 1846e90..da31b74 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -65,6 +65,7 @@
 CONFIG_FASTBOOT_MMC_USER_NAME="mmc1"
 CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
 CONFIG_FASTBOOT_CMD_OEM_PARTCONF=y
+CONFIG_FASTBOOT_CMD_OEM_BOOTBUS=y
 CONFIG_GPIO_HOG=y
 CONFIG_DM_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_STM32=y