logo2menu: adding option to sync on/off input events separately

sysfs l2m_2_phase 1/0,
 - default 1 (on) will send input event 1 and 0 separately.
 That way the logo button will work as a fully functional menu
 button which has the possibility to be mapped for long tap
 event. (Like Hardware keys settings Long tap menu)
 - if set 0, long tap the logo area will switch off the screen

Change-Id: I894c2abbcb411e3abcd0e357741037b54b22a7ec