dm: arm: spl: Allow simple malloc() in SPL

For SPL it is sometimes useful to have a simple malloc() just to permit
driver model to work, in the cases where the full malloc() is not made
available by the board config.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 29cdad0..823b233 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -78,7 +78,7 @@
 	strlo	r0, [r1]		/* clear 32-bit GD word */
 	addlo	r1, r1, #4		/* move to next */
 	blo	clr_gd
-#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_SYS_MALLOC_F_LEN)
 	sub	sp, sp, #CONFIG_SYS_MALLOC_F_LEN
 	str	sp, [r9, #GD_MALLOC_BASE]
 #endif