Fix backend type name: CLBackend -> OpenCLBackend

The correct backend type name in OpenCL.jl is OpenCLBackend, not CLBackend.

Author: ChrisRackauckas

ext/OpenCLExt.jl

@@ -3,9 +3,9 @@ using OpenCL
 import DiffEqGPU
 
 using .OpenCL
-import .OpenCL: CLBackend
+import .OpenCL: OpenCLBackend
 
-DiffEqGPU.maxthreads(::CLBackend) = 256
-DiffEqGPU.maybe_prefer_blocks(::CLBackend) = CLBackend()
+DiffEqGPU.maxthreads(::OpenCLBackend) = 256
+DiffEqGPU.maybe_prefer_blocks(::OpenCLBackend) = OpenCLBackend()
 
 end

test/utils.jl

@@ -13,7 +13,7 @@ elseif GROUP == "Metal"
     Metal.MetalBackend()
 elseif GROUP == "OpenCL"
     using OpenCL
-    OpenCL.CLBackend()
+    OpenCL.OpenCLBackend()
 elseif GROUP == "JLArrays"
     using JLArrays
     JLArrays.JLBackend()