Staging: iio: dereferencing uninitialized variable

In the error handling, it dereferences "st" before it has been
initialized.  I also just tidied it up a bit to remove some extra
conditions.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 file changed