Replace open-coded getting root OF node and matching against it with
new of_machine_device_match() helper.

Signed-off-by: Krzysztof Kozlowski <redacted>

---

Depends on the first OF patch.
---
  drivers/soc/tegra/common.c | 12 +-----------
  1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
index dff6d5ef4e46..d82b7670abb7 100644
--- a/drivers/soc/tegra/common.c
+++ b/drivers/soc/tegra/common.c

@@ -27,17 +27,7 @@ static const struct of_device_id tegra_machine_match[] = {
  
  bool soc_is_tegra(void)
  {
-	const struct of_device_id *match;
-	struct device_node *root;
-
-	root = of_find_node_by_path("/");
-	if (!root)
-		return false;
-
-	match = of_match_node(tegra_machine_match, root);
-	of_node_put(root);
-
-	return match != NULL;
+	return of_machine_device_match(tegra_machine_match);
  }
  
  static int tegra_core_dev_init_opp_state(struct device *dev)