gimble: enable PSYS monitoring
Enable PSYS function for monitor the total platform power from
the adapter and battery
BRANCH=none
TEST=make -j BOARD=gimble
#define CONFIG_CHARGE_RAMP_SW
#define CONFIG_CHARGER_BQ25710_SENSE_RESISTOR 10
#define CONFIG_CHARGER_BQ25710_SENSE_RESISTOR_AC 10
+#define CONFIG_CHARGER_BQ25710_PSYS_SENSING
/* PROCHOT defines */
#define BATT_MAX_CONTINUE_DISCHARGE_WATT 45
