spl: Use SYS_MALLOC_F instead of SYS_MALLOC_F_LEN

Use the new SPL/TPL/VPL_SYS_MALLOC_F symbols to determine whether the
malloc pool exists.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <sean.anderson@seco.com>
diff --git a/arch/sh/lib/start.S b/arch/sh/lib/start.S
index ddb9aa9f..f0e1c80 100644
--- a/arch/sh/lib/start.S
+++ b/arch/sh/lib/start.S
@@ -53,7 +53,7 @@
 
 	mov.l	._gd_init, r13		/* global data */
 	mov.l	._stack_init, r15	/* stack */
-#if CONFIG_VAL(SYS_MALLOC_F_LEN)
+#if CONFIG_IS_ENABLED(SYS_MALLOC_F)
 	mov.l	._gd_malloc_base, r14
 	mov.l	r15, @r14
 #endif
@@ -73,7 +73,7 @@
 ._bss_start:		.long	bss_start
 ._bss_end:		.long	bss_end
 ._gd_init:		.long	(_start - GENERATED_GBL_DATA_SIZE)
-#if CONFIG_VAL(SYS_MALLOC_F_LEN)
+#if CONFIG_IS_ENABLED(SYS_MALLOC_F)
 ._gd_malloc_base:	.long	(_start - GENERATED_GBL_DATA_SIZE + GD_MALLOC_BASE)
 #endif
 ._stack_init:		.long	(_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)