[patch] power_meter: acpi_device_class "power_meter_resource" too long

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acpi_device_class can only be 19 characters and a NULL terminator.

The current code has a buffer overflow in acpi_power_meter_add():
       strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS);

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
Feel free to change the name to anything you like.

diff --git a/drivers/acpi/power_meter.c b/drivers/acpi/power_meter.c
index 834c5af..31baa1e 100644
--- a/drivers/acpi/power_meter.c
+++ b/drivers/acpi/power_meter.c
@@ -34,7 +34,7 @@
 #define ACPI_POWER_METER_NAME		"power_meter"
 ACPI_MODULE_NAME(ACPI_POWER_METER_NAME);
 #define ACPI_POWER_METER_DEVICE_NAME	"Power Meter"
-#define ACPI_POWER_METER_CLASS		"power_meter_resource"
+#define ACPI_POWER_METER_CLASS		"pwr_meter_resource"
 
 #define NUM_SENSORS			17
 
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