Revert "cpufreq: interactive: Allow 1 ms error in above_hispeed_delay comparisons"

This reverts commit ff6af807.

Commit ff6af807 tries to avoid a corner case where frequency is stuck in
hispeed_freq for one additional window. For example, if timer_rate is
20ms, and go_hispeed_delay is 40ms, frequency might be stuck at
hispeed_freq for 60ms due to imprecision in jiffies. Same problem can be
easily solved by making go_hispeed_delay 1ms smaller instead of changing
the code.

Change-Id: Idab7c29ed28374df219210e444454068864d144d
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>