mfd: max77686: Remove check which is always true

As 'reg' is unsigned, it can't be less than 0, so checking if it is
greater than or equal to 0 will always result in a true condition.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index 86e5523..929795e 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -52,7 +52,7 @@
 static bool max77802_pmic_is_accessible_reg(struct device *dev,
 					    unsigned int reg)
 {
-	return (reg >= MAX77802_REG_DEVICE_ID && reg < MAX77802_REG_PMIC_END);
+	return reg < MAX77802_REG_PMIC_END;
 }
 
 static bool max77802_rtc_is_accessible_reg(struct device *dev,