padata: Rename padata_alloc functions

We rename padata_alloc to padata_alloc_possible because this
function allocates a padata_instance and uses the cpu_possible
mask for parallel and serial workers. Also we rename __padata_alloc
to padata_alloc to avoid to export underlined functions. Underlined
functions are considered to be private to padata. Users are updated
accordingly.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c
index 794c172..5546083 100644
--- a/crypto/pcrypt.c
+++ b/crypto/pcrypt.c
@@ -457,7 +457,7 @@
 	if (!pcrypt->wq)
 		goto err;
 
-	pcrypt->pinst = padata_alloc(pcrypt->wq);
+	pcrypt->pinst = padata_alloc_possible(pcrypt->wq);
 	if (!pcrypt->pinst)
 		goto err_destroy_workqueue;