Minor comment and invalidate non-existent LCD pin in board-rk3188-box

Pin invalidated due to boot log showing: "request lcd en pin fail!"
The comment is because avs_init() is commented out, though it is present
in rk30-box
WARNING: very important function rk3188_get_temp is hardcoded!

Found this function that has been hardcoded as 60 degrees.
TODO: find out if it's really used to adjust cpu freq and if there are any means to find rk3188's temperature
Fixes to RK31 to allow FRAMEBUFFER_CONSOLE (rk3188_lcdc and rk_fb)

This is basically the same fix that rk3066 needed to boot with this
kernel, now applied to rk3188_lcdc.c too.
Problem arises because RK moved the screen turning on to lcdc removing
it from rk_fb, and then the framebuffer_console fails (producing a stick
reboot) for not finding the screen.

Recommended to set CONFIG_FRAMEBUFFER_CONSOLE and unset CONFIG_LOGO or
else only half the screen is available for the boot log
Current .config for S400 with FB console

RTL8188EU enabled since I believe that's the Wifi on board, from the
Android boot log
config for S400 without most trace/debugging, Wifi not working yet