modpost: rename handle_modversions() to handle_symbol()

This function handles not only modversions, but also unresolved
symbols, export symbols, etc.

Rename it to a more proper function name.

While I was here, I also added the 'const' qualifier to *sym.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

scripts/mod/modpost.c

@@ -683,8 +683,8 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
 	return 0;
 }
 
-static void handle_modversions(struct module *mod, struct elf_info *info,
-			       Elf_Sym *sym, const char *symname)
+static void handle_symbol(struct module *mod, struct elf_info *info,
+			  const Elf_Sym *sym, const char *symname)
 {
 	unsigned int crc;
 	enum export export;
@@ -2051,7 +2051,7 @@ static void read_symbols(const char *modname)
 	for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
 		symname = remove_dot(info.strtab + sym->st_name);
 
-		handle_modversions(mod, &info, sym, symname);
+		handle_symbol(mod, &info, sym, symname);
 		handle_moddevtable(mod, &info, sym, symname);
 	}