hwmon: normal_i2c arrays should be const

Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index 8ee07c5..e1c183f 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -73,7 +73,7 @@
  * LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
  */
 
-static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
 
 /*
  * Insmod parameters