Fix the error handling in the EFIFB driver if platform_driver_probe() fails.
In that case, the code will pass the driver struct to the _device_
unregistration function.  It presumably should pass a pointer to the device
struct instead.

The compiler gives the following warning to indicate this:

drivers/video/efifb.c: In function 'efifb_init':
drivers/video/efifb.c:544:3: warning: passing argument 1 of 'platform_device_unregister' from incompatible pointer type
include/linux/platform_device.h:40:13: note: expected 'struct platform_device *' but argument is of type 'struct platform_driver *'

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Peter Jones <pjones@redhat.com>
cc: linux-fbdev@vger.kernel.org
cc: stable@kernel.org
---

 drivers/video/efifb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 69c49df..784139a 100644
--- a/drivers/video/efifb.c
+++ b/drivers/video/efifb.c

@@ -541,7 +541,7 @@ static int __init efifb_init(void)
 	 */
 	ret = platform_driver_probe(&efifb_driver, efifb_probe);
 	if (ret) {
-		platform_device_unregister(&efifb_driver);
+		platform_device_unregister(&efifb_device);
 		return ret;
 	}