Port pipelining example to new kernel API.

Author: Diptorup Deb

numba_dpex/examples/kernel/pipelining.py

@@ -23,8 +23,8 @@
 
 
 @dpex.kernel
-def async_kernel(x):
-    idx = dpex.get_global_id(0)
+def async_kernel(item, x):
+    idx = item.get_id(0)
 
     for i in range(1300):
         den = x.dtype.type(i + 1)