ARM: multi_v7_defconfig: Stop using deprecated USB_EHCI_TEGRA

The USB_EHCI_TEGRA option is deprecated now and replaced by
USB_CHIPIDEA_TEGRA. Replace USB_EHCI_TEGRA with USB_CHIPIDEA_TEGRA
in multi_v7_defconfig.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210320151915.7566-1-digetx@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>