MIPS: ath79: dts: use ar9331.dtsi from linux v4.7-rc2
Nowadays we have AR9331 devicetree from linux v4.7-rc2
in the file dts/src/mips/qca/ar9331.dtsi.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>