configs: stm32mp15: enable IPCC mailbox

Activate the ipcc mailbox for stm32mp15 configs.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index 79687d3..05e789b 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -66,6 +66,8 @@
 CONFIG_SYS_I2C_STM32F7=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
+CONFIG_DM_MAILBOX=y
+CONFIG_STM32_IPCC=y
 CONFIG_DM_MMC=y
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_STM32_SDMMC2=y
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index e1ab2ab..1b1e6ba 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -58,6 +58,8 @@
 CONFIG_SYS_I2C_STM32F7=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
+CONFIG_DM_MAILBOX=y
+CONFIG_STM32_IPCC=y
 CONFIG_DM_MMC=y
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_STM32_SDMMC2=y