yes AMD APP SDK is supported on Intel CPU if there is AMD GPU.
Have optimus laptop (Nvidia 630m+Intel Ivy i5).
When building with MinGW i use AMD APP SDK (because it provides libOpenCL.a for MinGW and Nvidia doesn't) and all works fine, applications sees 2 platforms Nvidia Cuda and Intel OpenCL. Intel has 2 devices CPU and GPU.
But Intel drivers should be installed to use Intel CPU as a part of Intel OpenCL.
There are some mentions of AMD Runtime supporting any CPU with SSE2 on this forum.
In this case it should be seen as a part of AMD platform (never checked this). And AMD APP Runtime must be installed (part of catalyst driver).