configure: fix --enable-multi-kernel configure option
configure: fix --enable-multi-kernel configure option

Previously, adding --enable-multi-kernel to the configure options disabled
use of the fusion kernel device

Signed-off-by: André Draszik <4a4cb09e7b43b167f95b1dc166b9a7dec9f65d7c@st.com>

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