iio: buffer: remove unneeded test
iio: buffer: remove unneeded test

The same code is executed regardless ret value, so this test
can be removed.
Also fix coverity scan CID 1268786.

Signed-off-by: Laurent Navet <049659cdfcbbaec8e29d19668ed7e4a1a04d7a9f@gmail.com>
Signed-off-by: Jonathan Cameron <09f65b71b7655725897b2fd41a09a0cefe2e1ace@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs