configs: stm32mp15: activate CMD_EXPORTENV

Activate CONFIG_CMD_EXPORTENV to accept the command "env export".

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 b61f337..fea237e 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -31,7 +31,6 @@
 CONFIG_SYS_PROMPT="STM32MP> "
 CONFIG_CMD_ADTIMG=y
 # CONFIG_CMD_ELF is not set
-# CONFIG_CMD_EXPORTENV is not set
 CONFIG_CMD_ERASEENV=y
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_MEMTEST=y
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index afc6cde..8d652da 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -15,7 +15,6 @@
 CONFIG_SYS_PROMPT="STM32MP> "
 CONFIG_CMD_ADTIMG=y
 # CONFIG_CMD_ELF is not set
-# CONFIG_CMD_EXPORTENV is not set
 CONFIG_CMD_ERASEENV=y
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_MEMTEST=y