sh772x: Fix warnings in sh7722_jpeg.c
sh772x: Fix warnings in sh7722_jpeg.c

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