x86: kconfig: Make FSP_TEMP_RAM_ADDR depend on HAVE_FSP

FSP_TEMP_RAM_ADDR should only be visible when HAVE_FSP is on.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ac1dc65..3506ba2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -220,6 +220,7 @@
 
 config FSP_TEMP_RAM_ADDR
 	hex
+	depends on HAVE_FSP
 	default 0x2000000
 	help
 	  Stack top address which is used in FspInit after DRAM is ready and