[fix] fix typos across dma_seq code

Fix a few typos in the dma_linux_seq code, that for some reason didn't
raise any flags so far. Also add a small validation to the unit test.

src/dma_linux_seq.c

@@ -24,7 +24,7 @@ int aml_dma_request_linux_seq_copy_init(struct aml_dma_request_linux_seq *req,
 {
 	assert(req != NULL);
 
-	req->type = AML_DMA_REQUEST_TYPE_MOVE;
+	req->type = AML_DMA_REQUEST_TYPE_COPY;
 	/* figure out pointers */
 	req->dest = aml_tiling_tilestart(dt, dptr, dtid);
 	req->src = aml_tiling_tilestart(st, sptr, stid);

tests/dma_linux_seq.c

@@ -35,15 +35,20 @@ int main(int argc, char *argv[])
 	assert(!aml_dma_linux_seq_init(&dma, maxrequests));
 
 	/* allocate some memory */
-	src = aml_area_malloc(&area, TILESIZE*PAGE_SIZE*NBTILES); 
+	src = aml_area_malloc(&area, TILESIZE*PAGE_SIZE*NBTILES);
 	assert(src != NULL);
-	dst = aml_area_malloc(&area, TILESIZE*PAGE_SIZE*NBTILES); 
+	dst = aml_area_malloc(&area, TILESIZE*PAGE_SIZE*NBTILES);
 	assert(dst != NULL);
 
+	memset(src, 42, TILESIZE*PAGE_SIZE*NBTILES);
+	memset(dst, 24, TILESIZE*PAGE_SIZE*NBTILES);
+
 	/* move some stuff by copy */
 	for(int i = 0; i < NBTILES; i++)
 		aml_dma_copy(&dma, &tiling, dst, i, &tiling, src, i);
 
+	assert(!memcmp(src, dst, TILESIZE*PAGE_SIZE*NBTILES));
+
 	/* now move it by pages */
 	for(int i = 0; i < NBTILES; i++)
 		aml_dma_move(&dma, &area, &tiling, src, i);