cpufreq: exynos5440: Fix inconsistent indenting

Fix inconsistent indenting and unneeded white space in assignment.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>