spi: meson-spicc: set SPI clock flag CLK_SET_RATE_PARENT

Add SPI clock flag CLK_SET_RATE_PARENT for using pclk as parent clock.
This gives SPI more flexibility in frequency selection.
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Signed-off-by: Sunny Luo <sunny.luo@amlogic.com>
Link: https://lore.kernel.org/r/20240524-spi_pclk_setparent-v1-1-99e0ce70b66f@amlogic.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-meson-spicc.c

@@ -644,11 +644,13 @@ static int meson_spicc_pow2_clk_init(struct meson_spicc_device *spicc)
 	snprintf(name, sizeof(name), "%s#pow2_fixed_div", dev_name(dev));
 	init.name = name;
 	init.ops = &clk_fixed_factor_ops;
-	init.flags = 0;
-	if (spicc->data->has_pclk)
+	if (spicc->data->has_pclk) {
+		init.flags = CLK_SET_RATE_PARENT;
 		parent_data[0].hw = __clk_get_hw(spicc->pclk);
-	else
+	} else {
+		init.flags = 0;
 		parent_data[0].hw = __clk_get_hw(spicc->core);
+	}
 	init.num_parents = 1;
 
 	pow2_fixed_div->mult = 1,
@@ -708,11 +710,13 @@ static int meson_spicc_enh_clk_init(struct meson_spicc_device *spicc)
 	snprintf(name, sizeof(name), "%s#enh_fixed_div", dev_name(dev));
 	init.name = name;
 	init.ops = &clk_fixed_factor_ops;
-	init.flags = 0;
-	if (spicc->data->has_pclk)
+	if (spicc->data->has_pclk) {
+		init.flags = CLK_SET_RATE_PARENT;
 		parent_data[0].hw = __clk_get_hw(spicc->pclk);
-	else
+	} else {
+		init.flags = 0;
 		parent_data[0].hw = __clk_get_hw(spicc->core);
+	}
 	init.num_parents = 1;
 
 	enh_fixed_div->mult = 1,