Handle ina226 overflow

[fl4p]

V=79.7/25.2 I=0.34/1.06A  27.5W 13℃23℃ 450sps  0㎅/s DCM(H|L|Lm)= 585|1219|1228 st=SWEEP,1 lag=2937㎲ N=2630 rssi=-61
(154848801): converter: DCM -> CCM (M=0.33, I=4.45, ∆I=8.42)
(154899750): converter: CCM -> DCM (M=0.33, I=4.20, ∆I=8.42)
(156580932): Current below threshold 0.05
(156581418): Back-flow switch disabled
(156581457): Sync rect disabled
W (156581) dcdc: set sync-rect PWM to minimum 1781 -> 123 (vRatio=0.320, pwmMaxLS=1790)
W (156584) ina22x: Overflow!
(156585619): Limiting! Control value -220.32 => perturbation -19.35 (to 825), mode=CV, idx=1 (act=26.212, tgt=29.000)
I (156587) mppt: PWM fade to 677 stopped at controlMode CC