spl: Make SPL_STACK available for ROCKCHIP_RK3036 without spl framework

rk3036 soc has limit internal sram, and not able to support spl
framework.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 8805dd3..6405374 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -371,7 +371,8 @@
 
 config SPL_STACK
 	hex "Initial stack pointer location"
-	depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && SPL_FRAMEWORK
+	depends on (ARM || ARCH_JZ47XX || MICROBLAZE || RISCV) && \
+		SPL_FRAMEWORK || ROCKCHIP_RK3036
 	depends on !SPL_SHARES_INIT_SP_ADDR
 	default 0x946bb8 if ARCH_MX7
 	default 0x93ffb8 if ARCH_MX6 && MX6_OCRAM_256KB