efi: app: Disable CONFIG_USB_EHCI_PCI

It does not build if without CONFIG_DM_PCI_COMPAT. For now we just
disable it, until some day we add USB support to EFI application.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/efi-x86.h b/include/configs/efi-x86.h
index 7fb37f0..6dd0b32 100644
--- a/include/configs/efi-x86.h
+++ b/include/configs/efi-x86.h
@@ -20,6 +20,7 @@
 #undef CONFIG_SCSI_AHCI
 #undef CONFIG_CMD_SCSI
 #undef CONFIG_INTEL_ICH6_GPIO
+#undef CONFIG_USB_EHCI_PCI
 
 #define CONFIG_STD_DEVICES_SETTINGS     "stdin=usbkbd,vga,serial\0" \
 					"stdout=vga,serial\0" \