configs/qemu/x86: enable USB support

We're not trying to be minimal here, and qemu can bridge/emulate certain
usb devices, so enable the different controllers and at least usb
storage.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/qemu/x86/linux-4.4.config

@@ -13,12 +13,17 @@ CONFIG_8139CP=y
 CONFIG_INPUT_EVDEV=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_DRM=y
+CONFIG_DRM_QXL=y
 CONFIG_SOUND=y
 CONFIG_SND=y
 CONFIG_SND_HDA_INTEL=y
 CONFIG_SND_HDA_GENERIC=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_UHCI_HCD=y
+CONFIG_USB_STORAGE=y
 CONFIG_EXT4_FS=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
-CONFIG_DRM=y
-CONFIG_DRM_QXL=y