[PATCH 1/2] cpufreq: conservative: fix requested_freq reduction issue

When decreasing frequency, requested_freq may be less than freq_target, So requested_freq minus freq_target may be negative, But reqested_freq's unit is unsigned int, then the negative result will be one larger integer which may be even higher than requested_freq. This patch is to fix such issue.

[PATCH 1/2] cpufreq: conservative: fix requested_freq reduction issue

When decreasing frequency, requested_freq may be less than freq_target, So requested_freq minus freq_target may be negative, But reqested_freq's unit is unsigned int, then the negative result will be one larger integer which may be even higher than requested_freq. This patch is to fix such issue.