cpufreq: schedutil: Simplify sugov_update_next_freq()

[ Upstream commit 90ac908a ]

Rearrange a conditional to make it more straightforward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Stable-dep-of: 8e461a1c ("cpufreq: schedutil: Fix superfluous updates caused by need_freq_update")
Signed-off-by: Sasha Levin <sashal@kernel.org>