configs: vexpress: Fix USB config for Linux 4.0

The config option for the USB device was changed in Linux 4.0 by
commit 100832abf065 ("usb: isp1760: Make HCD support optional")

Signed-off-by: Jon Medhurst <tixy@linaro.org>
diff --git a/linaro/configs/vexpress.conf b/linaro/configs/vexpress.conf
index 45618ce..8370cf1 100644
--- a/linaro/configs/vexpress.conf
+++ b/linaro/configs/vexpress.conf
@@ -37,7 +37,7 @@
 CONFIG_SND=y
 CONFIG_SND_ARMAACI=y
 CONFIG_USB=y
-CONFIG_USB_ISP1760_HCD=y
+CONFIG_USB_ISP1760=y
 CONFIG_USB_STORAGE=y
 CONFIG_MMC=y
 CONFIG_MMC_ARMMMCI=y