arch:arm:boot:dts:overlays: Added waveshare 13.3 readme

Signed-off-by: eng33 <[email protected]>

Author: eng33

arch/arm/boot/dts/overlays/README

@@ -5324,6 +5324,8 @@ Params: 2_8_inch                2.8" 480x640
         8_0_inch                8.0" 1280x800
         10_1_inch               10.1" 1280x800
         11_9_inch               11.9" 320x1480
+	13.3inch-30fps        13.3″ 1920x1080 2lane
+	13.3inch-60fps        13.3″ 1920x1080 4lane
         i2c1                    Use i2c-1 with jumper wires from GPIOs 2&3
         disable_touch           Disable the touch controller
         rotation                Set the panel orientation property