drivers: iio: imu: Updated sample timestamp management for jitter reduction

Updated ASM330 timestamp management function of sensor to reduce
jitter in output.

Signed-off-by: mario tesi <mario.tesi@st.com>
(cherry picked from commit 03e7a797fb900a6f6da0ace769b80a1e34e278f2)
Git-commit: 03e7a797fb900a6f6da0ace769b80a1e34e278f2
Git-Repo: https://github.com/STMicroelectronics/
STMems_ASM330LHH_IIO_HAL_Driver.git.

Change-Id: I5bcf67dfea9faaccd4de068b446612ad54a233fa
Signed-off-by: Puneet Yatnal <puneet@codeaurora.org>
3 files changed