staging: iio: ad9832: Remove redundant check
staging: iio: ad9832: Remove redundant check

'val' is unsigned and cannot be negative.

Signed-off-by: Sachin Kamat <1c3b1584a6008857f36c03c58f657c0fc16fc09e@samsung.com>
Cc: Michael Hennerich <bf9d0829050bba8aab106a244979e83b680c6bb9@blackfin.uclinux.org>
Signed-off-by: Jonathan Cameron <09f65b71b7655725897b2fd41a09a0cefe2e1ace@kernel.org>

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