[generic] Rewrote Dacc_RGB_to_YCbCr_C and Dacc_YCbCr_to_RGB_C using Duff's device with macros.
[generic] Rewrote Dacc_RGB_to_YCbCr_C and Dacc_YCbCr_to_RGB_C using Duff's device with macros.

Conversion also supports 4:4:4 by this change, not optimizing for 4:2:x cases.

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