configs: stm32mp15: enable stm32 remoteproc

Activate the remote processor support for stm32mp15 configs.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
diff --git a/configs/stm32mp15_optee_defconfig b/configs/stm32mp15_optee_defconfig
index a205f47..6d60af2 100644
--- a/configs/stm32mp15_optee_defconfig
+++ b/configs/stm32mp15_optee_defconfig
@@ -88,6 +88,7 @@
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_DM_REGULATOR_STM32_VREFBUF=y
 CONFIG_DM_REGULATOR_STPMIC1=y
+CONFIG_REMOTEPROC_STM32_COPRO=y
 CONFIG_SERIAL_RX_BUFFER=y
 CONFIG_STM32_SERIAL=y
 CONFIG_SPI=y