[PATCH 4.7 080/184] iio:core: fix IIO_VAL_FRACTIONAL sign handling

4.7-stable review patch. If anyone has any objections, please let me know. -- From: Gregor Boirie commit 171c0091837c81ed5c949fec6966bb5afff2d1cf upstream. 7985e7c100 ("iio: Introduce a new fractional value type") introduced a new IIO_VAL_FRACTIONAL

[PATCH 4.7 080/184] iio:core: fix IIO_VAL_FRACTIONAL sign handling

4.7-stable review patch. If anyone has any objections, please let me know. -- From: Gregor Boirie commit 171c0091837c81ed5c949fec6966bb5afff2d1cf upstream. 7985e7c100 ("iio: Introduce a new fractional value type") introduced a new IIO_VAL_FRACTIONAL value type meant to