stm32mp1: use the command env info in env_check

Activate CMD_NVEDIT_INFO and use the new command "env info -d -p -q"
to automatically save the environment on first boot.

This patch allows to remove the env_default variable.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index ea7d574..4003c2e 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -45,6 +45,7 @@
 	select STM32_RESET
 	select STM32_SERIAL
 	select SYS_ARCH_TIMER
+	imply CMD_NVEDIT_INFO
 	imply SYSRESET_PSCI if TFABOOT
 	imply SYSRESET_SYSCON if !TFABOOT
 	help