arm: odroid: cpufreq: Support for frequency up to 1.7 GHz

arm: odroid: cpufreq: Support for frequency up to 1.7 GHz

Values used for supporting Odroid U3 frequencies were taken from Odroid repo:

https://github.com/hardkernel/linux.git
branch odroid-3.8.y
config arch/arm/configs/odroidu_defconfig

Three new frequencies have been added: 1.6, 1.704 and 1.8 GHz.

It is important to note, that in the device tree cpufreq node one just
needs to specify the list of supported frequencies at the freq_table
attribute.

Change-Id: I416a35b99da9c341f92648541c81238a51dc362f
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>