Enable magic SysRq key functions by default

configname: CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE

Linux Kernel Configuration
└─>Kernel hacking
└─>Generic Kernel Debugging Instruments
└─>Enable magic SysRq key functions by default
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Specifies which SysRq key functions are enabled by default.
This may be set to 1 or 0 to enable or disable them all, or
to a bitmask as described in