[PATCH] Revert "board: st: stm32mp1: Clean env_get_location()"

[Kory Maincent]

This reverts commit d37641c61ba212241c38e3fd22f0335fc0bebc96.

Restore support for environment storage in EXT4 filesystem on eMMC boot.
The previous cleanup incorrectly removed this fallback option which is
needed for boards that store their environment in an EXT4 partition.

This configuration is OS-specific rather than board-dependent and should
remain as it is configurable via menuconfig. Even if it is not described
in ST defconfigs people may have enabled it in their defconfig.

Signed-off-by: Kory Maincent <kory.mainc...@bootlin.com>
---

Debugging this issue raises another issue that need investigation.
If env_get_location return ENVL_IS_NOWHERE but CONFIG_ENV_IS_NOWHERE is
not set, U-boot stall without any log. There might be an ENV check issue
here.
---
 board/st/stm32mp1/stm32mp1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index ab7af69d472..cb5cab9f36a 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -751,6 +751,8 @@ enum env_location env_get_location(enum env_operation op, 
int prio)
        case BOOT_FLASH_EMMC:
                if (CONFIG_IS_ENABLED(ENV_IS_IN_MMC))
                        return ENVL_MMC;
+               else if (CONFIG_IS_ENABLED(ENV_IS_IN_EXT4))
+                       return ENVL_EXT4;
                else
                        return ENVL_NOWHERE;
 
-- 
2.43.0