kconfig: move strhash() to util.c as a global function

Remove the 'static' qualifier from strhash() so that it can be accessed
from other files. Move it to util.c, which is a more appropriate location.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/lkc.h

@@ -52,6 +52,7 @@ static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
 }
 
 /* util.c */
+unsigned int strhash(const char *s);
 const char *file_lookup(const char *name);
 void *xmalloc(size_t size);
 void *xcalloc(size_t nmemb, size_t size);

scripts/kconfig/symbol.c

@@ -803,15 +803,6 @@ bool sym_is_changeable(struct symbol *sym)
 	return sym->visible > sym->rev_dep.tri;
 }
 
-static unsigned strhash(const char *s)
-{
-	/* fnv32 hash */
-	unsigned hash = 2166136261U;
-	for (; *s; s++)
-		hash = (hash ^ *s) * 0x01000193;
-	return hash;
-}
-
 struct symbol *sym_lookup(const char *name, int flags)
 {
 	struct symbol *symbol;

scripts/kconfig/util.c

@@ -9,6 +9,16 @@
 #include <string.h>
 #include "lkc.h"
 
+unsigned int strhash(const char *s)
+{
+	/* fnv32 hash */
+	unsigned int hash = 2166136261U;
+
+	for (; *s; s++)
+		hash = (hash ^ *s) * 0x01000193;
+	return hash;
+}
+
 struct file {
 	struct file *next;
 	char name[];