[PATCH V5] hwmon: (ibmpowernv) Add highest/lowest attributes to sensors

OCC provides historical minimum and maximum value for the sensor readings. This patch exports them as highest and lowest attributes for the inband sensors copied by OCC to main memory. Signed-off-by: Shilpasri G Bhat --- Changes from V4: - Got rid of 'len'

[PATCH V5] hwmon: (ibmpowernv) Add highest/lowest attributes to sensors

OCC provides historical minimum and maximum value for the sensor readings. This patch exports them as highest and lowest attributes for the inband sensors copied by OCC to main memory. Signed-off-by: Shilpasri G Bhat --- Changes from V4: - Got rid of 'len' variable in populate_attr_groups