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>

In Linux meson-g12-common.dtsi was introduced as well as new g12b nodes
and headers, as dependencies of new meson-g12b-a311d-khadas-vim3.dts.

Copied from da0c9ea146cb ("Linux 5.4-rc2")
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>