hwmon: (mlxreg-fan) Fix macros for tacho fault reading

[ Upstream commit 243cfe3fb8978c7eec24511aba7dac98819ed896 ]

Fix macros for tacometer fault reading.
This fix is relevant for three Mellanox systems MQMB7, MSN37, MSN34,
which are about to be released to the customers.
At the moment, none of them is at customers sites.

Fixes: 65afb4c8 ("hwmon: (mlxreg-fan) Add support for Mellanox FAN driver")
Signed-off-by: NVadim Pasternak <vadimp@mellanox.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

drivers/hwmon/mlxreg-fan.c

@@ -51,7 +51,7 @@
  */
 #define MLXREG_FAN_GET_RPM(rval, d, s)	(DIV_ROUND_CLOSEST(15000000 * 100, \
 					 ((rval) + (s)) * (d)))
-#define MLXREG_FAN_GET_FAULT(val, mask) (!!((val) ^ (mask)))
+#define MLXREG_FAN_GET_FAULT(val, mask) (!((val) ^ (mask)))
 #define MLXREG_FAN_PWM_DUTY2STATE(duty)	(DIV_ROUND_CLOSEST((duty) *	\
 					 MLXREG_FAN_MAX_STATE,		\
 					 MLXREG_FAN_MAX_DUTY))