__ibm440eplike_fixup_clocks
unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 0);
unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1);
unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1);