module: remove unneeded casts in cmp_name()

You can pass opaque pointers directly.

I also renamed 'va' and 'vb' into more meaningful arguments.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>

kernel/module.c

@@ -555,12 +555,9 @@ static const char *kernel_symbol_namespace(const struct kernel_symbol *sym)
 #endif
 }
 
-static int cmp_name(const void *va, const void *vb)
+static int cmp_name(const void *name, const void *sym)
 {
-	const char *a;
-	const struct kernel_symbol *b;
-	a = va; b = vb;
-	return strcmp(a, kernel_symbol_name(b));
+	return strcmp(name, kernel_symbol_name(sym));
 }
 
 static bool find_exported_symbol_in_section(const struct symsearch *syms,