i.MX 8MP MIPI seamless display (连续显示) between U-boot and Kernel

[#1]

Please notice the following patches are only tested in the environment that is listed below. For the environment with other software versions or hardware equipment, some other editing  may be required

Environment:

• i.MX 8MP EVK

• MIPI DSI: MX8-DSI-OLED1 (RM67191)

• Software: LF5.15.71

U-boot:

1. Apply '0001-Modify-u-boot-to-show-logo-seamlessly.patch' to make sure display related models won't be power off, which will help to achieve seamless display.

Kernel:

1. Apply '0001-Keep-NXP-logo-until-Weston-is-booted-8MP-MIPI.patch' to make sure MIPI-DSI related models won't be re-init in the booting progress.