ARM: sunxi: Fix Ippo-q8h-v5 defconfig filename

The defconfig for Ippo-q8h-v5 was incorrectly committed as
"Ippo_q8h". This patch renames it correctly, as well as
correct a typo in my name in the maintainers listing.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>