configs: stm32mp15: activate CMD_IMPORTENV

Activate CONFIG_CMD_IMPORTENV to accept the command "env import".
This command is useful in script to include some variable.

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 ce7225c..b61f337 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -32,7 +32,6 @@
 CONFIG_CMD_ADTIMG=y
 # CONFIG_CMD_ELF is not set
 # CONFIG_CMD_EXPORTENV is not set
-# CONFIG_CMD_IMPORTENV 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 50288fe..afc6cde 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -16,7 +16,6 @@
 CONFIG_CMD_ADTIMG=y
 # CONFIG_CMD_ELF is not set
 # CONFIG_CMD_EXPORTENV is not set
-# CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_ERASEENV=y
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_MEMTEST=y