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/arch/arm/dts/imx6qdl-aristainetos2c.dtsi b/arch/arm/dts/imx6qdl-aristainetos2c.dtsi
index ba13d55..70c0177 100644
--- a/arch/arm/dts/imx6qdl-aristainetos2c.dtsi
+++ b/arch/arm/dts/imx6qdl-aristainetos2c.dtsi
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0)
 /*
- * support for the imx6 based aristainetos2c board
+ * support for the imx6 based aristainetos2c+2d boards
  *
  * Copyright (C) 2019 Heiko Schocher <hs@denx.de>
  * Copyright (C) 2015 Heiko Schocher <hs@denx.de>
@@ -79,6 +79,14 @@
 	};
 };
 
+&gpio7 {
+	eMMC_reset {
+		gpio-hog;
+		output-high;
+		gpios = <8 GPIO_ACTIVE_HIGH>;
+	};
+};
+
 &can1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_flexcan1>;
@@ -172,6 +180,8 @@
 			MX6QDL_PAD_EIM_A21__GPIO2_IO17		0x4001b0b0
 			/* TPM Reset */
 			MX6QDL_PAD_EIM_A20__GPIO2_IO18		0x4001b0b0
+			/* eMMC Reset# */
+			MX6QDL_PAD_SD3_RST__GPIO7_IO08		0x4001b0b0
 		>;
 	};