rockchip: Kconfig: move rk3368 config into its Kconfig

Each SoC have its config setting and its Kconfig, move
the specific setting to its own Kconfig file.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3368/Kconfig b/arch/arm/mach-rockchip/rk3368/Kconfig
index 325572a..31ef243 100644
--- a/arch/arm/mach-rockchip/rk3368/Kconfig
+++ b/arch/arm/mach-rockchip/rk3368/Kconfig
@@ -53,4 +53,13 @@
 config SPL_LDSCRIPT
 	default "arch/arm/cpu/armv8/u-boot-spl.lds"
 
+config TPL_MAX_SIZE
+        default 28672
+
+config TPL_STACK
+        default 0xff8cffff
+
+config TPL_TEXT_BASE
+        default 0xff8c1000
+
 endif