spl: Remove bogus GD_FLG_SPL_INIT check

Remove the check for GD_FLG_SPL_INIT in spl_relocate_stack_gd().
The check will always fail. This is because spl_relocate_stack_gd()
is called from ARM's crt0.S and it is called before board_init_r().
The board_init_r() calls spl_init(), which sets the GD_FLG_SPL_INIT
flag.

Note that reserving the malloc area in RAM is not a problem even
if the GD_FLG_SPL_INIT flag is not set.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Pavel Machek <pavel@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Stephen Warren <swarren@nvidia.com>

common/spl/spl.c

@@ -486,9 +486,6 @@ ulong spl_relocate_stack_gd(void)
 
 #ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
 	if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
-		if (!(gd->flags & GD_FLG_SPL_INIT))
-			panic_str("spl_init must be called before heap reloc");
-
 		ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
 		gd->malloc_base = ptr;
 		gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;