rockchip: Add max spl size & spl header configs

Our chips may have different max spl size and spl header, so
we need to add configs for that.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Dropped CONFIG_ROCKCHIP_MAX_SPL_SIZE from rk3288_common.h,
Added $(if...) to tools/Makefile to fix widespread build breakage
Signed-off-by: Simon Glass <sjg@chromium.org>

Series-changes: 8
- Drop CONFIG_ROCKCHIP_MAX_SPL_SIZE from rk3288_common.h,
- Add $(if...) to tools/Makefile to fix widespread build breakage
diff --git a/tools/rkcommon.c b/tools/rkcommon.c
index 4389622..18778aa 100644
--- a/tools/rkcommon.c
+++ b/tools/rkcommon.c
@@ -50,7 +50,7 @@
 {
 	struct header0_info *hdr;
 
-	if (file_size > RK_MAX_CODE1_SIZE)
+	if (file_size > CONFIG_ROCKCHIP_MAX_SPL_SIZE)
 		return -ENOSPC;
 
 	memset(buf,  '\0', RK_CODE1_OFFSET * RK_BLK_SIZE);