[libata] fix smatch warning for zpodd_wake_dev

Fix a smatch warning caused by an useless pointer check.
The context parameter (aka. ata_dev) will never be NULL until we remove
the acpi notification handler, so it is pointless to check it for NULL.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Aaron Lu <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
1 file changed