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imx8/sai: double the delay; set clock explicitly

--- a/sys/src/9/imx8/sai.c

+++ b/sys/src/9/imx8/sai.c

@@ -365,7 +365,7 @@

 	ctlr->reg = (u32int*)(VIRTIO + 0x8b0000);

 	ctlr->adev = adev;

-	adev->delay = 1024;

+	adev->delay = 2048;

 	adev->ctlr = ctlr;

 	adev->write = saiwrite;

 	adev->close = saiclose;

@@ -383,7 +383,6 @@

 void

 sailink(void)

 {

-

 	iomuxpad("pad_sai2_rxfs", "sai2_rx_sync", "SION ~LVTTL HYS PUE ~ODE FAST 45_OHM VSEL_0");

 	iomuxpad("pad_sai2_rxc", "sai2_rx_bclk", "SION ~LVTTL HYS PUE ~ODE FAST 45_OHM VSEL_0");

 	iomuxpad("pad_sai2_rxd0", "sai2_rx_data0", "SION ~LVTTL HYS PUE ~ODE FAST 45_OHM VSEL_0");

@@ -392,6 +391,8 @@

 	iomuxpad("pad_sai2_txd0", "sai2_tx_data0", "SION ~LVTTL HYS PUE ~ODE FAST 45_OHM VSEL_0");

 	iomuxpad("pad_sai2_mclk", "sai2_mclk", "SION ~LVTTL HYS PUE ~ODE FAST 45_OHM VSEL_0");

+	setclkgate("sai2.ipg_clk", 0);

+	setclkrate("sai2.ipg_clk", "audio_pll1_clk", 25*Mhz);

 	setclkgate("sai2.ipg_clk", 1);

 	addaudiocard("sai", saiprobe);