Exynos5: Remove unneeded USB delays

Change-Id: I1144e9d6d6c4278842fdd36743c8a88555f81707
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/65912
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit 95b518877edc88347ce9725ffee32f3aed0de7dc)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6505
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/cpu/samsung/exynos5250/usb.c

@@ -88,10 +88,11 @@ static void setup_usb_phy(struct usb_phy *usb, int hsic_gpio)
 	udelay(10);
 	clrbits_le32(&usb->hsicphyctrl1, HOST_CTRL0_PHYSWRST);
 
-	/* PHY clock and power setup time */
-	// FIXME If this happens more than 50ms before executing the payload,
-	// we might not need this delay.
-	mdelay(50);
+	/* At this point we need to wait for 50ms before talking to
+	 * the USB controller (PHY clock and power setup time)
+	 * By the time we are actually in the payload, these 50ms
+	 * will have passed.
+	 */
 }
 
 void usb_init(device_t dev)

src/cpu/samsung/exynos5420/usb.c

@@ -88,10 +88,11 @@ static void setup_usb_phy(struct usb_phy *usb, int hsic_gpio)
 	udelay(10);
 	clrbits_le32(&usb->hsicphyctrl1, HOST_CTRL0_PHYSWRST);
 
-	/* PHY clock and power setup time */
-	// FIXME If this happens more than 50ms before executing the payload,
-	// we might not need this delay.
-	mdelay(50);
+	/* At this point we need to wait for 50ms before talking to
+	 * the USB controller (PHY clock and power setup time)
+	 * By the time we are actually in the payload, these 50ms
+	 * will have passed.
+	 */
 }
 
 void usb_init(device_t dev)