Error messages after memory allocation failures are unnecessary and
can be dropped, given that they are emitted as dev_dbg() so nobody except
person actively debugging the driver would see them.

Also replace jump to return 'goto l; ... l: return e;' with 'return e;'
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>