i2c: tegra: change phrasing, "fallbacking" to "falling back"

The phrasing in two dev_err messages is using fallbacking which
os less understandable than "falling back", so fix this up.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-tegra.c

@@ -452,7 +452,7 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
 	tegra_i2c_release_dma(i2c_dev);
 	if (err != -EPROBE_DEFER) {
 		dev_err(i2c_dev->dev, "cannot use DMA: %d\n", err);
-		dev_err(i2c_dev->dev, "fallbacking to PIO\n");
+		dev_err(i2c_dev->dev, "falling back to PIO\n");
 		return 0;
 	}
 
@@ -965,7 +965,7 @@ static void tegra_i2c_config_fifo_trig(struct tegra_i2c_dev *i2c_dev,
 		if (ret < 0) {
 			dev_err(i2c_dev->dev, "DMA slave config failed: %d\n",
 				ret);
-			dev_err(i2c_dev->dev, "fallbacking to PIO\n");
+			dev_err(i2c_dev->dev, "falling back to PIO\n");
 			tegra_i2c_release_dma(i2c_dev);
 			i2c_dev->is_curr_dma_xfer = false;
 		} else {