This patch introduces a function that adds missing clock-frequencyInstead of using 'clock-frequency' device tree property for global/twd
properties to Marvellmpcore timers of Armada 38x timer nodes.SoCs, It usesset it in platform_late_init stage
fdt_fixup_table processed by ofw_fdt_fixup function.
This fix-up is a part of device tree alignment between device trees
from FreeBSD and Linux, where clock-frequency is not used, but
calculated dynamicaly by clock framework in the timer driverswith arm_tmr_change_frequency() function.