replace CONFIG_PRELOADER with CONFIG_SPL_BUILD

replace all occurences of CONFIG_PRELOADER with CONFIG_SPL_BUILD

Signed-off-by: Aneesh V <aneesh@ti.com>
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index a975d42..b17d267 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -284,7 +284,7 @@
 	cmp	r0, r2			/* until source end address [r2]    */
 	blo	copy_loop
 
-#ifndef CONFIG_PRELOADER
+#ifndef CONFIG_SPL_BUILD
 	/*
 	 * fix .rel.dyn relocations
 	 */
@@ -326,7 +326,7 @@
 #endif
 
 clear_bss:
-#ifndef CONFIG_PRELOADER
+#ifndef CONFIG_SPL_BUILD
 	ldr	r0, _bss_start_ofs
 	ldr	r1, _bss_end_ofs
 	mov	r4, r6			/* reloc addr */