rockchip: rk3288: add separate TPL STACK address

TPL is at SRAM while other stage is at SDRAM, so it needs
separate STACK.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 9d891ad..1090d21 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -95,6 +95,7 @@
 	imply TPL_LIBCOMMON_SUPPORT
 	imply TPL_LIBGENERIC_SUPPORT
 	imply TPL_NEEDS_SEPARATE_TEXT_BASE
+	imply TPL_NEEDS_SEPARATE_STACK
 	imply TPL_OF_CONTROL
 	imply TPL_OF_PLATDATA
 	imply TPL_RAM
@@ -118,6 +119,9 @@
 config TPL_MAX_SIZE
 	default 32768
 
+config TPL_STACK
+        default 0xff718000
+
 endif
 
 config ROCKCHIP_RK3328