restore functionality call that shouldn't have been removed

in cleanup. Dummy adapters must return 0, otherwise they
      will get assigned every functionality!


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1812 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/busses/i2c-isa.c

@@ -31,10 +31,13 @@
 #include <linux/i2c.h>
 #include "version.h"
 
+static u32 isa_func(struct i2c_adapter *adapter);
+
 /* This is the actual algorithm we define */
 static struct i2c_algorithm isa_algorithm = {
 	.name		= "ISA bus algorithm",
 	.id		= I2C_ALGO_ISA,
+	.functionality	= isa_func,
 };
 
 /* There can only be one... */
@@ -45,6 +48,12 @@ static struct i2c_adapter isa_adapter = {
 	.algo		= &isa_algorithm,
 };
 
+/* We can't do a thing... */
+static u32 isa_func(struct i2c_adapter *adapter)
+{
+	return 0;
+}
+
 static int __init i2c_isa_init(void)
 {
 	printk("i2c-isa.o version %s (%s)\n", LM_VERSION, LM_DATE);