To prevent race conditions with the framework lists when reading the
clk_measure files, the debugcc device will cache its parents during
init by calling clk_hw_get_parent_by_index() for all of them. This
requires debugcc to probe after all its parents. Add clock phandles
for them so debugcc doesn't probe until its suppliers.
Change-Id: Ib47696590a7554ddc83095b3f1ab1d865cd93e24