usb: xhci-dwc3: Fix support for dis_enblslpm_quirk

No device tree in U-Boot or linux use the wrong spelling used in code.

Use correct property name as defined in dwc3 bindings.

Fixes: 062790f46131 ("usb: xhci-dwc3: Add USB2 PHY configuration")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 1dbd65d..6cebe1c 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -197,7 +197,7 @@
 		reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
 	}
 
-	if (dev_read_bool(dev, "snps,dis_enblslpm-quirk"))
+	if (dev_read_bool(dev, "snps,dis_enblslpm_quirk"))
 		reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
 
 	if (dev_read_bool(dev, "snps,dis-u2-freeclk-exists-quirk"))