ti_prcm_clock_find
clk_parent = ti_prcm_clock_find(sc, parent);
tc = ti_prcm_clock_find(prcm_softc, p);
clk = ti_prcm_clock_find(sc, name);
tc_parent = ti_prcm_clock_find(sc, tc->u.fixed_factor.parent);
struct ti_prcm_clk *ti_prcm_clock_find(struct ti_prcm_softc *, const char *);