bootm: Fix bmi->images pointer not initialized in some cases

When building with only bootz command, without bootm, images pointer
inside bootm_info structure is not initialized. And since this structure
is stored in stack, the generated error is kind of random, but most of
the time this will generate: "ramdisk - allocation error".

Also, after analysis, this problem could occur with the command booti,
if the command bootm is disabled.

Currently bootm_init() is called by: do_bootz(), do_bootm(), do_booti()
and by do_stm32prog(). And all of these commands execute bootm_run_states()
which access the images pointer stored into bootm_info structure.

So, to fix this issue, just do the assignment unconditionally.

Fixes: c2211ff651 ("bootm: Add more fields to bootm_info")
Signed-off-by: Benjamin ROBIN <dev@benjarobin.fr>
Reviewed-by: Tom Rini <trini@konsulko.com>

boot/bootm.c

@@ -1264,9 +1264,7 @@ void bootm_init(struct bootm_info *bmi)
 {
 	memset(bmi, '\0', sizeof(struct bootm_info));
 	bmi->boot_progress = true;
-	if (IS_ENABLED(CONFIG_CMD_BOOTM) || IS_ENABLED(CONFIG_CMD_BOOTZ) ||
+	bmi->images = &images;
-	    IS_ENABLED(CONFIG_CMD_BOOTI) || IS_ENABLED(CONFIG_PXE_UTILS))
-		bmi->images = &images;
 }
 
 /**