fifo8: replace fifo8_pop_bufptr() with fifo8_peekpop_bufptr() in fifo8_pop_buf()

The upcoming peek functionality will require passing a non-zero
value to fifo8_peekpop_bufptr().

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Octavian Purdila <tavip@google.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240828122258.928947-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/util/fifo8.c b/util/fifo8.c
index 62d6430..efe0117 100644
--- a/util/fifo8.c
+++ b/util/fifo8.c
@@ -116,7 +116,7 @@
     }
 
     len = destlen;
-    buf = fifo8_pop_bufptr(fifo, len, &n1);
+    buf = fifo8_peekpop_bufptr(fifo, len, 0, &n1, true);
     if (dest) {
         memcpy(dest, buf, n1);
     }
@@ -125,7 +125,7 @@
     len -= n1;
     len = MIN(len, fifo8_num_used(fifo));
     if (len) {
-        buf = fifo8_pop_bufptr(fifo, len, &n2);
+        buf = fifo8_peekpop_bufptr(fifo, len, 0, &n2, true);
         if (dest) {
             memcpy(&dest[n1], buf, n2);
         }