CVE-2023-53166 power: supply: bq25890: Fix external_power_changed race

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq25890: Fix externalpowerchanged race bq25890chargerexternalpowerchanged dereferences bq-charger, which gets sets in bq25890powersupplyinit like this: bq-charger = devmpowersupplyregisterbq-dev, &bq-desc, &psycfg;...