tegra: Migrate CI_UDC_HAS_HOSTPC to Kconfig

This option is only enabled for CI_UDC and !TEGRA20, so implement it as
such in Kconfig directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
16 files changed