usb: dwc3: core: remove unnecessary dev_warn()

When a SoC supports both PHY interfaces but
doesn't define HSPHY in DT/pdata, we will get
an unnecessary dev_warn() which can mislead users
into thinking that they're missing something.

Instead, let's just silently rely on a correct
default. If the HW default is wrong, then HSPHY
is required and USB won't work, this will be
motivation enough for engineers to patch their
way into a working setup.
Reported-by: NMurali Karicheri <m-karicheri2@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc3/core.c

@@ -455,8 +455,6 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
 			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
 		} else {
-			dev_warn(dwc->dev, "HSPHY Interface not defined\n");
-
 			/* Relying on default value. */
 			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
 				break;