kernel:config: Enabled additional dmabuf drivers/frameworks

We still have some issues with the allocation of continous memory for
the VPU support. Enabled some additional drivers/frameworks in the
kernel to perform further tests.

recipes-kernel/linux/linux-imx-5.15/mx8m/defconfig

@@ -672,6 +672,7 @@ CONFIG_FSL_DPAA2_QDMA=m
 CONFIG_DMATEST=y
 CONFIG_DMABUF_HEAPS=y
 CONFIG_DMABUF_HEAPS_SYSTEM=y
+CONFIG_DMABUF_HEAPS_SYSTEM_UNCACHED=y
 CONFIG_DMABUF_HEAPS_CMA=y
 CONFIG_DMABUF_HEAPS_DSP=y
 CONFIG_UIO=y
@@ -824,3 +825,5 @@ CONFIG_MEMTEST=y
 CONFIG_VIDEO_HANTRO=m
 # CONFIG_ION is not set
 # CONFIG_ION_CMA_HEAP is not set
+CONFIG_DMABUF_HEAPS=y
+CONFIG_DMA_SHARED_BUFFER=y