soc: nxp: imx943: Fix potential out-of-bounds access in pm_mcore loop

Limit the loop to the smaller of nvic_iser_nb and
GPC_CPU_CTRL_CMC_IRQ_WAKEUP_MASK_COUNT to ensure safe access.

Signed-off-by: Yongxu Wang <[email protected]>

Author: yongxu-wang15

soc/nxp/imx/imx9/imx943/pm_mcore.c

@@ -36,7 +36,8 @@ static void pm_state_before(void)
 	};
 
 	/* IRQs enabled at NVIC level become GPC wake sources */
-	for (uint32_t idx = 0; idx < nvic_iser_nb; idx++) {
+	for (uint32_t idx = 0; idx <
+			MIN(GPC_CPU_CTRL_CMC_IRQ_WAKEUP_MASK_COUNT, nvic_iser_nb); idx++) {
 		wake_mask[idx] = ~(NVIC->ISER[idx]);
 	}