imx: copy patches 5.15 to 6.1

copy 5.15 patches excluding some that need manual rework touching
non-upstream led props.

Signed-off-by: Tim Harvey <[email protected]>

target/linux/imx/patches-6.1/100-bootargs.patch

@@ -0,0 +1,11 @@
+--- a/arch/arm/boot/dts/imx6dl-wandboard.dts
++++ b/arch/arm/boot/dts/imx6dl-wandboard.dts
+@@ -16,4 +16,8 @@
+ 		device_type = "memory";
+ 		reg = <0x10000000 0x40000000>;
+ 	};
++
++	chosen {
++		bootargs = "console=ttymxc0,115200";
++	};
+ };

target/linux/imx/patches-6.1/311-ARM-imx7d-pico-pi.dts-add-default-stdout-path.patch

@@ -0,0 +1,23 @@
+From 6e8e5ccfbee7a531b035ffce3f95f3901946fa9d Mon Sep 17 00:00:00 2001
+From: Robert Nelson <[email protected]>
+Date: Wed, 9 Jan 2019 14:33:24 -0600
+Subject: [PATCH] ARM: imx7d-pico-pi.dts: add default stdout-path
+
+Signed-off-by: Robert Nelson <[email protected]>
+---
+ arch/arm/boot/dts/imx7d-pico-pi.dts | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/arch/arm/boot/dts/imx7d-pico-pi.dts
++++ b/arch/arm/boot/dts/imx7d-pico-pi.dts
+@@ -16,6 +16,10 @@
+ 		label-mac-device = &fec1;
+ 	};
+ 
++	chosen {
++		stdout-path = "serial4:115200n8";
++	};
++
+ 	leds {
+ 		compatible = "gpio-leds";
+ 		pinctrl-names = "default";