Sync the device tree and dt-bindings from Linux v5.7-rc1 8f3d9f354286
("Linux 5.7-rc1").
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>

Sync the device tree and dt-bindings from Linux v5.6-rc2
11a48a5a18c6 ("Linux 5.6-rc2")

The only exception to this is the mmc pinctrl pin bias of gxl SoC family.
This is a fix which found its way to u-boot but not Linux yet.
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>

Sync the Amlogic Meson G12A DT and Bindings file with the Linux 5.3-rc1
from the commit 5f9e832c1370 ("Linus 5.3-rc1").

Also remove the meson-g12a-u-boot.dtsi and meson-g12a-u200-u-boot.dtsi,
now conflicting with the main DT content.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Tested-by: NMark Kettenis <kettenis@openbsd.org>

Sync from Linux commit a188339ca5a3 ("Linux 5.2-rc1")
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>

Import Linux 5.1-rc1 DT from 9e98c678c2d6 ("Linux 5.1-rc1") for the
meson-g12a-u200 board, the meson-g12a.dtsi and the corresponding bindings.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>