x86: Correct usage of FSP_VERSION2

As the code is today, we get a warning about "select" statements on
"choice" options not doing anything. In this case, we move to having a
"default FSP_VERSION2 if INTEL_APOLLOLAKE" in order to get the desired
outcome.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index dc9483a..6ca0605 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -390,6 +390,7 @@
 choice
 	prompt "FSP version"
 	depends on HAVE_FSP
+	default FSP_VERSION2 if INTEL_APOLLOLAKE
 	default FSP_VERSION1
 	help
 	  Selects the FSP version to use. Intel has published several versions