hwmon: normal_i2c arrays should be const

Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
index 747693a..6b5325f 100644
--- a/drivers/hwmon/adt7470.c
+++ b/drivers/hwmon/adt7470.c
@@ -30,7 +30,7 @@
 #include <linux/log2.h>
 
 /* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
 
 /* Insmod parameters */
 I2C_CLIENT_INSMOD_1(adt7470);