kernel: add missing kernel config option

The CONFIG_SOFTLOCKUP_DETECTOR_INTR_STORM option shows up when the
OpenWrt option CONFIG_KERNEL_SOFTLOCKUP_DETECTOR is activated.

Link: https://github.com/openwrt/openwrt/pull/21710
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/generic/config-6.12

@@ -6396,6 +6396,7 @@ CONFIG_SND_X86=y
 # CONFIG_SOC_OMAP5 is not set
 # CONFIG_SOC_TI is not set
 # CONFIG_SOFTLOCKUP_DETECTOR is not set
+# CONFIG_SOFTLOCKUP_DETECTOR_INTR_STORM is not set
 # CONFIG_SOFT_WATCHDOG is not set
 # CONFIG_SOLARIS_X86_PARTITION is not set
 # CONFIG_SONYPI is not set