ARM: sun4i: dt: Add support for the INet-97F_Rev_02 board

This patch adds basic support for the INet-97F_Rev_02 board found in various
low cost consumer tablet devices (http://linux-sunxi.org/INet-97F_Rev_02

)

Signed-off-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>