regulator: ltc3676: Fix incorrect IRQSTAT bit offsets

The LTC3676_IRQSTAT_* bit definitions do not match the IRQSTAT
(Interrupt Request Status) register layout documented in Table 15
of the LTC3676/LTC3676-1 datasheet:

  bit 0 - Pushbutton Status Active
  bit 1 - Hard Reset Occurred
  bit 2 - PGOOD Timeout Occurred
  bit 3 - Undervoltage Warning
  bit 4 - Undervoltage Standby (Fault) Occurred
  bit 5 - Overtemperature Warning
  bit 6 - Overtemperature Standby (Fault) Occurred
  bit 7 - Reserved

The driver instead defines these starting at bit 3, one bit higher
than the datasheet specifies, which causes ltc3676_regulator_isr()
to check the wrong status bits and misreport (or miss) PGOOD
timeout, undervoltage and thermal warning/fault conditions.

Fix the bit offsets to match the datasheet.

Fixes: 37b918a ("regulator: Add LTC3676 support")
Cc: stable@vger.kernel.org
Signed-off-by: Abhishek Ojha <Abhishek.ojha@savoirfairelinux.com>
Link: https://patch.msgid.link/20260715170408.295552-1-Abhishek.ojha@savoirfairelinux.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: abhishekojhasfl

drivers/regulator/ltc3676.c

@@ -45,11 +45,11 @@
 #define LTC3676_DVBxA_REF_SELECT	BIT(5)
 #define LTC3676_DVBxB_PGOOD_MASK	BIT(5)
 
-#define LTC3676_IRQSTAT_PGOOD_TIMEOUT	BIT(3)
-#define LTC3676_IRQSTAT_UNDERVOLT_WARN	BIT(4)
-#define LTC3676_IRQSTAT_UNDERVOLT_FAULT	BIT(5)
-#define LTC3676_IRQSTAT_THERMAL_WARN	BIT(6)
-#define LTC3676_IRQSTAT_THERMAL_FAULT	BIT(7)
+#define LTC3676_IRQSTAT_PGOOD_TIMEOUT	BIT(2)
+#define LTC3676_IRQSTAT_UNDERVOLT_WARN	BIT(3)
+#define LTC3676_IRQSTAT_UNDERVOLT_FAULT	BIT(4)
+#define LTC3676_IRQSTAT_THERMAL_WARN	BIT(5)
+#define LTC3676_IRQSTAT_THERMAL_FAULT	BIT(6)
 
 enum ltc3676_reg {
 	LTC3676_SW1,