[POWERPC] drivers/of/of_i2c.c: Add MODULE_LICENSE

After commit 585468e5d5962660867c269e26f0a4b89a599473
([POWERPC] i2c: Fix build breakage introduced by OF helpers)
drivers/of/of_i2c.c needs a MODULE_LICENSE.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index 6316891..715a444 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -13,6 +13,7 @@
 
 #include <linux/i2c.h>
 #include <linux/of.h>
+#include <linux/module.h>
 
 struct i2c_driver_device {
 	char    *of_device;
@@ -113,3 +114,5 @@
 	}
 }
 EXPORT_SYMBOL(of_register_i2c_devices);
+
+MODULE_LICENSE("GPL");