audio: Replace AUDIO_FUNC with __func__

Apparently we don't use __MSC_VER as a compiler anymore and we always
require a C99 compiler (which means we always have __func__) so we don't
need a special AUDIO_FUNC macro. We can just replace AUDIO_FUNC with
__func__ instead.

Checkpatch failures were manually fixed.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180203084315.20497-2-armbru@redhat.com>
diff --git a/audio/ossaudio.c b/audio/ossaudio.c
index 0edd7ea..a042888 100644
--- a/audio/ossaudio.c
+++ b/audio/ossaudio.c
@@ -582,11 +582,9 @@
     }
 
     if (!oss->mmapped) {
-        oss->pcm_buf = audio_calloc (
-            AUDIO_FUNC,
-            hw->samples,
-            1 << hw->info.shift
-            );
+        oss->pcm_buf = audio_calloc(__func__,
+                                    hw->samples,
+                                    1 << hw->info.shift);
         if (!oss->pcm_buf) {
             dolog (
                 "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
@@ -705,7 +703,7 @@
     }
 
     hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
-    oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
+    oss->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
     if (!oss->pcm_buf) {
         dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
                hw->samples, 1 << hw->info.shift);