clk: imx: pll14xx: Add 320 MHz and 640 MHz entries for PLL146x

The PLL146x is used to implement SYS_PLL3 on i.MX8MP and can be used
to drive UARTn_ROOT clock. By setting the PLL3 to 320 MHz or 640 MHz,
the PLL3 output can be divided down to supply UARTn_ROOT clock with
precise 64 MHz, which divided down further by 16x oversampling factor
used by the i.MX UART core yields 4 Mbdps baud base for the UART IP.
This is useful e.g. for BCM bluetooth chips, which can operate up to
4 Mbdps.

Add 320 MHz and 640 MHz entries so the PLL can be configured accordingly.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20221031204838.195292-1-marex@denx.de

drivers/clk/imx/clk-pll14xx.c

@@ -54,7 +54,9 @@ static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = {
 	PLL_1416X_RATE(800000000U,  200, 3, 1),
 	PLL_1416X_RATE(750000000U,  250, 2, 2),
 	PLL_1416X_RATE(700000000U,  350, 3, 2),
+	PLL_1416X_RATE(640000000U,  320, 3, 2),
 	PLL_1416X_RATE(600000000U,  300, 3, 2),
+	PLL_1416X_RATE(320000000U,  160, 3, 2),
 };
 
 static const struct imx_pll14xx_rate_table imx_pll1443x_tbl[] = {