mfd: bcm590xx: Drop unused "id" member of bcm590xx struct

The "id" member of the bcm590xx struct is unused and will be confusing
once we add an actual PMU ID storage value. Drop it; a replacement
will be introduced in a future commit.

Signed-off-by: Artur Weber <[e-mail]>
Reviewed-by: "Rob Herring (Arm)" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

include/linux/mfd/bcm590xx.h

···
 	struct i2c_client *i2c_sec;
 	struct regmap *regmap_pri;
 	struct regmap *regmap_sec;
-	unsigned int id;
 
 	/* PMU ID value; also used as device type */
 	u8 pmu_id;