imx6: remove not longer supported aristainetos boards

Removed aristainetos2, 2b, 2b-csl. This boards have been
recalled and destroyed.

Adapt board code to remove stuff not needed anymore.

Fix checkpatch warning, remove fdt_high and initrd_high
from default environment.

Signed-off-by: Heiko Schocher <hs@denx.de>
zu remove
diff --git a/board/aristainetos/MAINTAINERS b/board/aristainetos/MAINTAINERS
index b4ca7ab..1c3fb3a 100644
--- a/board/aristainetos/MAINTAINERS
+++ b/board/aristainetos/MAINTAINERS
@@ -3,34 +3,11 @@
 S:	Maintained
 F:	board/aristainetos/
 F:	include/configs/aristainetos2.h
-F:	configs/aristainetos2_defconfig
-F:	configs/aristainetos2b_defconfig
-F:	configs/aristainetos2bcsl_defconfig
 F:	configs/aristainetos2c_defconfig
-F:	arch/arm/dts/imx6qdl-aristainetos2.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2-common.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2_7.dts
-F:	arch/arm/dts/imx6dl-aristainetos2_7.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2_7-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2_4.dts
-F:	arch/arm/dts/imx6dl-aristainetos2_4.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2_4-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2b_4.dts
-F:	arch/arm/dts/imx6dl-aristainetos2b_4-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2b_7.dts
-F:	arch/arm/dts/imx6dl-aristainetos2b_7-u-boot.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2b-u-boot.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2b.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2b_csl_4.dts
-F:	arch/arm/dts/imx6dl-aristainetos2b_csl_4-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2b_csl_7.dts
-F:	arch/arm/dts/imx6dl-aristainetos2b_csl_7-u-boot.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2b_csl.dtsi
-F:	arch/arm/dts/imx6qdl-aristainetos2b_csl-u-boot.dtsi
-F:	arch/arm/dts/imx6dl-aristainetos2c_4.dts
-F:	arch/arm/dts/imx6dl-aristainetos2c_4-u-boot.dtsi
 F:	arch/arm/dts/imx6dl-aristainetos2c_7.dts
 F:	arch/arm/dts/imx6dl-aristainetos2c_7-u-boot.dtsi
+F:	arch/arm/dts/imx6dl-aristainetos2_7.dtsi
+F:	arch/arm/dts/imx6qdl-aristainetos2-common.dtsi
+F:	arch/arm/dts/imx6qdl-aristainetos2-u-boot.dtsi
 F:	arch/arm/dts/imx6qdl-aristainetos2c.dtsi
 F:	arch/arm/dts/imx6qdl-aristainetos2c-u-boot.dtsi