[llvm] [OFFLOAD] Add support for host offloading device (PR #177307)

[Joseph Huber via llvm-commits]

================
@@ -43,7 +43,7 @@
 #endif
 
 // The number of devices in this plugin.
-#define NUM_DEVICES 4
+#define NUM_DEVICES 1
----------------
jhuber6 wrote:

Can this be a separate PR

https://github.com/llvm/llvm-project/pull/177307