enable dok's 8 bit colorkeying optimization for all big endian architecures
enable dok's 8 bit colorkeying optimization for all big endian architecures

PowerBook G3 400Mhz

df_dok --dfb:pixelformat=LUT8 --blit-colorkeyed

before: 13.16
after 42.70(!)

DirectFB/directfb,kevleyski/directfb,lancebaiyouview/DirectFB,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,lancebaiyouview/DirectFB,mtsekm/test,Distrotech/DirectFB,djbclark/directfb-core-DirectFB,kevleyski/directfb,sklnet/DirectFB,jcdubois/DirectFB,DirectFB/directfb,deniskropp/DirectFB,dfbdok/DirectFB1,kaostao/directfb,sklnet/DirectFB,kevleyski/directfb,dfbdok/DirectFB1,djbclark/directfb-core-DirectFB,kevleyski/DirectFB-1,mtsekm/test,kevleyski/DirectFB-1,kaostao/directfb,djbclark/directfb-core-DirectFB,DirectFB/directfb,deniskropp/DirectFB,jcdubois/DirectFB,kaostao/directfb,Distrotech/DirectFB,deniskropp/DirectFB,kevleyski/directfb,jcdubois/DirectFB,sklnet/DirectFB,sklnet/DirectFB,dfbdok/DirectFB1,kevleyski/DirectFB-1,djbclark/directfb-core-DirectFB,deniskropp/DirectFB,Distrotech/DirectFB,lancebaiyouview/DirectFB,mtsekm/test