arm64: dts: ti: am62x: am62p: Add simple-fb node

commit bef82fed82cfec76c105251d3ab2f55fcba2df51 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



U-boot now supports dynamic update of simple-framebuffer region and
framebuffer reservation for AM62x and AM62p platforms if bootloader
splashscreen is enabled.

U-boot detects simple-framebuffer stub in device-tree (which is kept
disabled by default) updates it with framebuffer meta-data (viz.
video format, framebuffer address) and enables it before booting Linux.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>