of: add vendor prefix for Tronsmart

This adds Tronsmart to the list of device tree vendor prefixes.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
ARM: dts: add Tronsmart Vega S89 Elite dts

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
ARM: meson: add SMP support
ARM: meson: rework SMP support