CAN_PFC_CLK
CAN_PFC_CLK(can_clk_a, CAN_CLK_A);
CAN_PFC_CLK(can_clk_b, CAN_CLK_B);
CAN_PFC_CLK(can_clk_c, CAN_CLK_C);
CAN_PFC_CLK(can_clk_d, CAN_CLK_D);