cpufreq: s3c2440: fix spelling mistake: "divsiors" -> "divisors"

Trivial fix to spelling mistake in s3c_freq_dbg debug message text.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>