tests: drivers: dma: chan_link: support 64-bit dma

The test does not appear to support 64-bit DMA
* mitigate compiler warning
* support 64-bit addressing mode with `CONFIG_DMA_64BIT`

Signed-off-by: Chris Friedt <[email protected]>
(cherry picked from commit 7f6d976)

Author: Chris Friedt

tests/drivers/dma/chan_link_transfer/src/test_dma.c

@@ -87,8 +87,13 @@ static int test_task(int minor, int major)
 	(void)memset(rx_data2, 0, sizeof(rx_data2));
 
 	dma_block_cfg.block_size = sizeof(tx_data);
+#ifdef CONFIG_DMA_64BIT
+	dma_block_cfg.source_address = (uint64_t)tx_data;
+	dma_block_cfg.dest_address = (uint64_t)rx_data2;
+#else
 	dma_block_cfg.source_address = (uint32_t)tx_data;
 	dma_block_cfg.dest_address = (uint32_t)rx_data2;
+#endif
 
 	if (dma_config(dma, TEST_DMA_CHANNEL_1, &dma_cfg)) {
 		TC_PRINT("ERROR: transfer\n");
@@ -104,8 +109,13 @@ static int test_task(int minor, int major)
 	dma_cfg.linked_channel = TEST_DMA_CHANNEL_1;
 
 	dma_block_cfg.block_size = sizeof(tx_data);
+#ifdef CONFIG_DMA_64BIT
+	dma_block_cfg.source_address = (uint64_t)tx_data;
+	dma_block_cfg.dest_address = (uint64_t)rx_data;
+#else
 	dma_block_cfg.source_address = (uint32_t)tx_data;
 	dma_block_cfg.dest_address = (uint32_t)rx_data;
+#endif
 
 	if (dma_config(dma, TEST_DMA_CHANNEL_0, &dma_cfg)) {
 		TC_PRINT("ERROR: transfer\n");