tegra: usb gadget: fix ci udc operation if not hostpc capable

The Tegra 2 aka T20 is not host PC capable. Therefore gate the define
CONFIG_CI_UDC_HAS_HOSTPC in tegra-common-usb-gadget.h in case of
CONFIG_TEGRA20.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/include/configs/tegra-common-usb-gadget.h b/include/configs/tegra-common-usb-gadget.h
index 00f854e..58a5a30 100644
--- a/include/configs/tegra-common-usb-gadget.h
+++ b/include/configs/tegra-common-usb-gadget.h
@@ -10,7 +10,9 @@
 
 #ifndef CONFIG_SPL_BUILD
 /* USB gadget mode support*/
+#ifndef CONFIG_TEGRA20
 #define CONFIG_CI_UDC_HAS_HOSTPC
+#endif
 /* USB mass storage protocol */
 #define CONFIG_USB_FUNCTION_MASS_STORAGE
 /* DFU protocol */