lcd: tve: JZ4750: Use device driver attribure to switch tvout

Instead of /proc/jz/tvout use /sys/devices/platform/jz-lcd.0/tv_out

Example:
  echo "ntsc" > /sys/devices/platform/jz-lcd.0/tv_out
or
  echo "off" > /sys/devices/platform/jz-lcd.0/tv_out
MIPS: JZ4750D: Set .id=-1 for 'jz-lcd' device
MIPS: JZ4750D: Remove uhc clock because jz4755 doesn't have usb host
MIPS: JZ4750D: Fix clock naming, lcd_pclk => lpclk
mmc: JZ4750: For safety limit max clock to 24000000
lcd: JZ4750: Use clk_* calls to operate lcd clocks

lcd: JZ4750: Enable/disable clocks in jz4750fb_change_clock, also resume/suspend

Otherwise it's screwing up with tv-out, fix it later
lcd: JZ4750: Remove useless comments and set new copyrights
lcd: tve: Remove bad pal settings
lcd: JZ4750: Inline jz4750lcd_info_switch_to_TVE() into jz_fb_tvout()