usb: host: ehci-msm: Use posted data writes on AHB

This patch sets the AHBMODE to allow for posted data writes.  This
results in higher performance.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Tested-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-msm.c

@@ -57,8 +57,8 @@ static int ehci_msm_reset(struct usb_hcd *hcd)
 
 	/* bursts of unspecified length. */
 	writel(0, USB_AHBBURST);
-	/* Use the AHB transactor */
-	writel(0, USB_AHBMODE);
+	/* Use the AHB transactor, allow posted data writes */
+	writel(0x8, USB_AHBMODE);
 	/* Disable streaming mode and select host mode */
 	writel(0x13, USB_USBMODE);