board-xenon.c: rlc - turn off SD card LED
davinci_mmc: rlc - flash SD card LED
check-lxdialog.sh: rlc - use -lncurses
sound: davinci-xenon: rlc - don't use MUTE gpio
LXT: rlc - configure LED1/2/3
davinci_rlc_defconfig: add LXT phy
board-xenon: explicitly init mmc version (no functional change)