coccinelle: Remove unnecessary variables for function return value

Use Coccinelle script to replace 'ret = E; return ret' with
'return E'. The script will do the substitution only when the
function return type and variable type are the same.

Manual fixups:

* audio/audio.c: coding style of "read (...)" and "write (...)"
* block/qcow2-cluster.c: wrap line to make it shorter
* block/qcow2-refcount.c: change indentation of wrapped line
* target-tricore/op_helper.c: fix coding style of
  "remainder|quotient"
* target-mips/dsp_helper.c: reverted changes because I don't
  want to argue about checkpatch.pl
* ui/qemu-pixman.c: fix line indentation
* block/rbd.c: restore blank line between declarations and
  statements

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1465855078-19435-4-git-send-email-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Unused Coccinelle rule name dropped along with a redundant comment;
whitespace touched up in block/qcow2-cluster.c; stale commit message
paragraph deleted]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/hw/pci-host/uninorth.c b/hw/pci-host/uninorth.c
index 15b1054232..7aac4d67a4 100644
--- a/hw/pci-host/uninorth.c
+++ b/hw/pci-host/uninorth.c
@@ -62,12 +62,9 @@ typedef struct UNINState {
 
 static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)
 {
-    int retval;
     int devfn = pci_dev->devfn & 0x00FFFFFF;
 
-    retval = (((devfn >> 11) & 0x1F) + irq_num) & 3;
-
-    return retval;
+    return (((devfn >> 11) & 0x1F) + irq_num) & 3;
 }
 
 static void pci_unin_set_irq(void *opaque, int irq_num, int level)