README: Don't Repeat Yourself
README: Don't Repeat Yourself

Instead of repeating install instructions for 'check', add link to
prerequisites.

Signed-off-by: Ola Jeppsson <793f970c52ded1276b9264c742f19d1888cbaf73@adapteva.com>

eliteraspberries/pal,aolofsson/pal,debug-de-su-ka/pal,parallella/pal,olajep/pal,eliteraspberries/pal,mateunho/pal,olajep/pal,debug-de-su-ka/pal,eliteraspberries/pal,8l/pal,Adamszk/pal3,olajep/pal,eliteraspberries/pal,RafaelRMA/pal,mateunho/pal,Adamszk/pal3,mateunho/pal,8l/pal,Adamszk/pal3,debug-de-su-ka/pal,8l/pal,parallella/pal,debug-de-su-ka/pal,olajep/pal,debug-de-su-ka/pal,parallella/pal,parallella/pal,RafaelRMA/pal,aolofsson/pal,mateunho/pal,mateunho/pal,parallella/pal,aolofsson/pal,Adamszk/pal3,aolofsson/pal,8l/pal,eliteraspberries/pal,RafaelRMA/pal,RafaelRMA/pal