device: Delete references to CMSIS pack from the cmake files

[mmahadevan108]

CMSIS is no longer part of the SDK Git repo

[mcuxsusan]

Hi @mmahadevan108, directly remove the cmsis dependency in device_CMSIS.make could result build failure for projects include this device_CMSIS.cmake to get the NXP cmsis files, will see how to resolve the issue.

[mmahadevan108]

Should we delete device_CMSIS.cmake since we do not include CMSIS in the SDK github and move this cmake to the CMSIS github repo we fork?

[mcuxsusan]

Hi @mmahadevan108, instead of deleting the device_CMSIS.cmake, I am thinking that maybe I could change the include(CMSIS_Include_core_cm) to include(CMSIS_Include_core_cm OPTIONAL) so that NO issue will be popped out if users like zephyr are not using our cmsis module, what do you see?