[PATCH v2] clk: mediatek: mt7981: feed MSDC from emmc_208m, not emmc_400m

[Shiji Yang]

Based on the U-Boot device tree, I think you should swap clock
sources "emmc_400m" and "emmc_208m".

```
--- a/drivers/clk/mediatek/clk-mt7981-infracfg.c
+++ b/drivers/clk/mediatek/clk-mt7981-infracfg.c
@@ -157,8 +157,8 @@ static const struct mtk_gate infra_clks[] = {
 	GATE_INFRA1(CLK_INFRA_SPI1_HCK_CK, "infra_spi1_hck", "infra_66m_mck",
 		    14),
 	GATE_INFRA1(CLK_INFRA_FRTC_CK, "infra_frtc", "cb_rtc_32k", 15),
-	GATE_INFRA1(CLK_INFRA_MSDC_CK, "infra_msdc", "emmc_400m", 16),
-	GATE_INFRA1(CLK_INFRA_MSDC_HCK_CK, "infra_msdc_hck", "emmc_208m", 17),
+	GATE_INFRA1(CLK_INFRA_MSDC_CK, "infra_msdc", "emmc_208m", 16),
+	GATE_INFRA1(CLK_INFRA_MSDC_HCK_CK, "infra_msdc_hck", "emmc_400m", 17),
 	GATE_INFRA1(CLK_INFRA_MSDC_133M_CK, "infra_msdc_133m", "sysaxi", 18),
 	GATE_INFRA1(CLK_INFRA_MSDC_66M_CK, "infra_msdc_66m", "sysaxi", 19),
 	GATE_INFRA1(CLK_INFRA_ADC_26M_CK, "infra_adc_26m", "infra_adc_frc", 20),
```
Regards,
Shiji Yang