Devicetree naming convention requires device node names to use hyphens
instead of underscore, so Exynos5422 devfreq event name
"ppmu-event3-dmc0_0" should be "ppmu-event3-dmc0-0".  Newly introduced
dtschema enforces this, however the driver still expects old name with
an underscore.

Add new events for Exynos5422 while still accepting old name for
backwards compatibility.

Signed-off-by: Krzysztof Kozlowski <redacted>
---
  drivers/devfreq/event/exynos-ppmu.c | 7 ++++++-
  1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
index 17ed980d9099..541bd13ab61d 100644
--- a/drivers/devfreq/event/exynos-ppmu.c
+++ b/drivers/devfreq/event/exynos-ppmu.c

@@ -94,11 +94,16 @@ static struct __exynos_ppmu_events {
  	PPMU_EVENT(d1-general),
  	PPMU_EVENT(d1-rt),
  
-	/* For Exynos5422 SoC */
+	/* For Exynos5422 SoC, deprecated (backwards compatible) */
  	PPMU_EVENT(dmc0_0),
  	PPMU_EVENT(dmc0_1),
  	PPMU_EVENT(dmc1_0),
  	PPMU_EVENT(dmc1_1),
+	/* For Exynos5422 SoC */
+	PPMU_EVENT(dmc0-0),
+	PPMU_EVENT(dmc0-1),
+	PPMU_EVENT(dmc1-0),
+	PPMU_EVENT(dmc1-1),
  };
  
  static int __exynos_ppmu_find_ppmu_id(const char *edev_name)