kernel_launch: move ebtype out of macro params
kernel_launch: move ebtype out of macro params

We'll explode it in the actual function instantiations, so it doesn't need
to be plumbed through all of the macros.
ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT