[media] solo6x10: fix 'BUG: key ffff88081a2a9b58 not in .data!'

Caused by a missing sysfs_attr_init().
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/solo6x10/core.c

@@ -481,6 +481,7 @@ static int solo_sysfs_init(struct solo_dev *solo_dev)
 		}
 	}
 
+	sysfs_attr_init(&sdram_attr->attr);
 	sdram_attr->attr.name = "sdram";
 	sdram_attr->attr.mode = 0440;
 	sdram_attr->read = sdram_show;