sun6i: Add defconfig and dts file for tablets using the inet-q972 PCB

Add a defconfig and dts file for tablets using the generic inet-q972 PCB.

Tablets with this PCB feature a mini-hdmi output, micro-usb usb-host,
micro-usb usb-otg, 3.5mm headphone jack, a micro sd slot,
(mini) power-barrel and an usb wifi module.

This has been tested on a 9.7" 1024x768 qware qw tb9718-qhd tablet.

The dts files are identical to the ones submitted to the upstream kernel.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index de719cd..c1d0f55 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -37,6 +37,7 @@
 F:	include/configs/sun6i.h
 F:	configs/colorfly_e708_q1_defconfig
 F:	configs/CSQ_CS908_defconfig
+F:	configs/inet_q972_defconfig
 F:	configs/Mele_A1000G_quad_defconfig
 F:	configs/Mele_M9_defconfig
 F:	configs/Sinovoip_BPI_M2_defconfig