pal_core.h: Add prefixes to defines to avoid name clashes
pal_core.h: Add prefixes to defines to avoid name clashes

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

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