make menuconfig
 
---> Device Drivers  
    ---> Graphics support  
        ---> Console display driver support  
            ---> Framebuffer Console Rotation          
                ---> Boot options  

启动参数修改为:console=ttymxc0,115200 fbcon=rotate:1
 
说明: fbcon=rotate:

This option changes the orientation angle of the console display. 
The value 'n' accepts the following:
0 - normal orientation (0 degree)  
1 - clockwise orientation (90 degrees)  
2 - upside down orientation (180 degrees) 
3 - counterclockwise orientation (270 degrees)
10-25 07:33