conf: Remove NONNULL(1,2) for virNetDevBandwidthFormat

Since the code checks and handles NULL parameters, remove the NONNULL
from the prototype.

Also fix the comment in the source to reference the right name.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/conf/netdev_bandwidth_conf.c

@@ -241,7 +241,7 @@ virNetDevBandwidthRateFormat(virNetDevBandwidthRatePtr def,
 }
 
 /**
- * virNetDevBandwidthDefFormat:
+ * virNetDevBandwidthFormat:
  * @def: Data source
  * @buf: Buffer to print to
  *

src/conf/netdev_bandwidth_conf.h

@@ -34,8 +34,7 @@ int virNetDevBandwidthParse(virNetDevBandwidthPtr *bandwidth,
                             int net_type)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
 int virNetDevBandwidthFormat(virNetDevBandwidthPtr def,
-                             virBufferPtr buf)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+                             virBufferPtr buf);
 
 void virDomainClearNetBandwidth(virDomainObjPtr vm)
     ATTRIBUTE_NONNULL(1);