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imx8: usb: enable host IN auto retry

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

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

@@ -51,6 +51,9 @@

 			DISSCRAMBLE = 1<<3,

 			DSBLCLKGTNG = 1<<0,

+		GUCTL	= 0xC12C/4,

+			USBHSTINAUTORETRY = 1<<14,

+

 		GFLADJ	= 0xC630/4,

 			GFLADJ_30MHZ_SDBND_SEL = 1<<7,

 			GFLADJ_30MHZ_SHIFT = 0,

@@ -59,6 +62,7 @@

 	};

 	reg[GCTL] &= ~(PWRDNSCALE_MASK | DISSCRAMBLE | DSBLCLKGTNG | PRTCAPDIR_MASK);

 	reg[GCTL] |= 2<<PWRDNSCALE_SHIFT | 1<<PRTCAPDIR_SHIFT;

+	reg[GUCTL] |= USBHSTINAUTORETRY;

 	reg[GFLADJ] = (reg[GFLADJ] & ~GFLADJ_30MHZ_MASK) | 0x20<<GFLADJ_30MHZ_SHIFT | GFLADJ_30MHZ_SDBND_SEL;

 }