[ARM] 3898/1: corgi_bl fix module loading

Fix module loading:
corgi_bl: module license 'GPLv2' taints kernel.
corgi_bl: Unknown symbol platform_driver_unregister
corgi_bl: Unknown symbol __symbol_get
corgi_bl: Unknown symbol platform_driver_register

Cc: Richard Purdie <rpurdie@rpsys.net>

Signed-off-by: pHilipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Anton Vorontsov <cbou@mail.ru>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/video/backlight/corgi_bl.c b/drivers/video/backlight/corgi_bl.c
index 6697778..d07ecb5 100644
--- a/drivers/video/backlight/corgi_bl.c
+++ b/drivers/video/backlight/corgi_bl.c
@@ -166,4 +166,4 @@
 
 MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
 MODULE_DESCRIPTION("Corgi Backlight Driver");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL");