Move I2C driver model init earlier in the boot sequence

This avoids oopsing in statically linked systems when some
subsystems register I2C drivers in subsys_initcall() code,
but those subsystems are linked (and initialized) before I2C.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/i2c/i2c-core.c

@@ -978,7 +978,7 @@ static void __exit i2c_exit(void)
 	bus_unregister(&i2c_bus_type);
 }
 
-subsys_initcall(i2c_init);
+postcore_initcall(i2c_init);
 module_exit(i2c_exit);
 
 /* ----------------------------------------------------