zephyr-kernel/2.7.0: update to release tag Zephyr v2.7.0

https://github.com/zephyrproject-rtos/zephyr/releases/tag/zephyr-v2.7.0



Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com>

recipes-kernel/zephyr-kernel/zephyr-kernel-src-2.7.0.inc

 SRCREV_FORMAT = "default_cmsis"
-SRCREV_default = "8a97c83040c0257d98c329dde55ae10e68544688"
+SRCREV_default = "3f826560aaf81a444018293bd6acce3c339fe150"
 SRCREV_cmsis = "b0612c97c1401feeb4160add6462c3627fe90fc7"
 SRCREV_nordic = "a6e5299041f152da5ae0ab17b2e44e088bb96d6d"
 SRCREV_stm32 = "5c8275071ec1cf160bfe8c18bbd9330a7d714dc8"