Revert "USB: EHCI: make ehci-vt8500 a separate driver"

This reverts commit d57ada0c.

All of these are wrong and need to be reverted for now.

Cc: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tony Prisk <linux@prisktech.co.nz>
Cc: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>