kconfig: use environment option

Use the environment option to provide the ARCH symbol
and the KERNELVERSION symbol.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/init/Kconfig b/init/Kconfig
index 288444b..0d0bbf2 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1,3 +1,11 @@
+config ARCH
+	string
+	option env="ARCH"
+
+config KERNELVERSION
+	string
+	option env="KERNELVERSION"
+
 config DEFCONFIG_LIST
 	string
 	depends on !UML
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 99e3d02..3929e5b 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -47,7 +47,6 @@
 {
 	struct symbol *sym;
 	struct utsname uts;
-	char *p;
 	static bool inited = false;
 
 	if (inited)
@@ -56,20 +55,6 @@
 
 	uname(&uts);
 
-	sym = sym_lookup("ARCH", 0);
-	sym->type = S_STRING;
-	sym->flags |= SYMBOL_AUTO;
-	p = getenv("ARCH");
-	if (p)
-		sym_add_default(sym, p);
-
-	sym = sym_lookup("KERNELVERSION", 0);
-	sym->type = S_STRING;
-	sym->flags |= SYMBOL_AUTO;
-	p = getenv("KERNELVERSION");
-	if (p)
-		sym_add_default(sym, p);
-
 	sym = sym_lookup("UNAME_RELEASE", 0);
 	sym->type = S_STRING;
 	sym->flags |= SYMBOL_AUTO;