mdev change no longer supporting v2.6.2x kernels by using /sys/dev

[Patrick Pief]

 ---- On Fri, 24 Mar 2017 11:25:14 +0100 Richard Moore <rich at richud.com> wrote ----  
 
 >   
 > Could there at least be a small warning on the main busybox.net page to  
 > make people aware to look at the changelog, perhaps something like ;  
 >   
 > 'Please note full support for 2.6.2x and older kernels is now being  
 > deprecated from 1.26 onwards'  
 >   
 
ATM the FAQ is still talking  about 2.4 support.