I started with KEIL webpage, there are published many header files for kinetis K or kinetis L. But no luck with KL05. Therefore I kept digging, until I found it in the sample code for KL25 (really? KL25 demo code contains other MCU header files).
Kinetis L Sample Code (KL25) [www.freescale.com]
This package is in the revision 6 at the moment. It contains the following CMSIS header files
- MKL04
- MKL05
- MKL14
- MKL15
- MKL24
- MKL25
CMSIS KL26 header file [www.keil.com]
There are more headers, just filter a search on google.
Once I find all possible CMSIS headers for Kinetis L, I'll publish them on github.