ARM: dts: imx6ul-tqma6ul1: Change include order to disable fec2 node

ARM: dts: imx6ul-tqma6ul1: Change include order to disable fec2 node

TQMa6UL1 has only one FEC which needs to be disabled as one of the last
steps.
imx6ul-tqma6ul2.dtsi can't be included in imx6ul-tqma6ul1.dtsi as the
defaults from imx6ul.dtsi will be applied again.

Fixes: 7b8861d8e627 ("ARM: dts: imx6ul: add TQ-Systems MBa6ULx device trees")
Signed-off-by: Max Merchel <Max.Merchel@ew.tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>