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/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index a2069f8..961a402 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -17,6 +17,21 @@
 	  and video codec support. Peripherals include Gigabit Ethernet,
 	  USB2 host and OTG, SDIO, I2S, UART, SPI, I2C and PWMs.
 
+config ROCKCHIP_SPL_HDR
+	string "Header of rockchip's spl loader"
+	help
+	  Rockchip's bootrom requires the spl loader to start with a 4-bytes
+	  header. The content of this header depends on the chip type.
+
+config ROCKCHIP_MAX_SPL_SIZE
+	hex "Max size of rockchip's spl loader"
+	help
+	  Different chip may have different sram size. And if we want to jump
+	  back to the bootrom after spl, we may need to reserve some sram space
+	  for the bootrom.
+	  The max spl loader size should be sram size minus reserved
+	  size(if needed)
+
 config SYS_MALLOC_F
 	default y