ab8500_fg: Replace msleep() with usleep_range() for greater accuracy
ab8500_fg: Replace msleep() with usleep_range() for greater accuracy

Doing so provides a greater degree of accuracy when dealing with
time-frames between 1us and 20ms. msleep() is only accurate for
wake-ups greater than 20ms.

Signed-off-by: Lee Jones <630e34333487a351a857f6b705e04d30b37c1629@linaro.org>
Signed-off-by: Jonas ABERG <39fc1ce28f1cdf552b189618c2eb1c1bd8a697e7@stericsson.com>
Reviewed-by: Johan BJORNSTEDT <99e35005c68de0d6583c223333a9016f5c679bf6@stericsson.com>
Signed-off-by: Anton Vorontsov <14deb5e5e417133e888bf47bb6a3555c9bb7d81c@enomsg.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas