Add cpufreq controller device node for Exynos5440 SoC for passing
parameters like controller base address, interrupt and cpufreq
table. This node is added outside cpu0 as this driver is now a platform
driver and a new device structure is needed.

Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>