Rename refcount.h to zfs_refcount.h

Renamed to avoid conflicting with refcount.h when a different
implementation is already provided by the platform.

Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10620

module/zfs/arc.c

@@ -284,7 +284,7 @@
 #include <sys/zio_checksum.h>
 #include <sys/zfs_context.h>
 #include <sys/arc.h>
-#include <sys/refcount.h>
+#include <sys/zfs_refcount.h>
 #include <sys/vdev.h>
 #include <sys/vdev_impl.h>
 #include <sys/dsl_pool.h>

module/zfs/bpobj.c

@@ -26,7 +26,7 @@
 
 #include <sys/bpobj.h>
 #include <sys/zfs_context.h>
-#include <sys/refcount.h>
+#include <sys/zfs_refcount.h>
 #include <sys/dsl_pool.h>
 #include <sys/zfeature.h>
 #include <sys/zap.h>

module/zfs/bptree.c

@@ -33,7 +33,6 @@
 #include <sys/dsl_dir.h>
 #include <sys/dsl_pool.h>
 #include <sys/dnode.h>
-#include <sys/refcount.h>
 #include <sys/spa.h>
 
 /*

module/zfs/dsl_deadlist.c

@@ -25,7 +25,6 @@
  */
 
 #include <sys/dmu.h>
-#include <sys/refcount.h>
 #include <sys/zap.h>
 #include <sys/zfs_context.h>
 #include <sys/dsl_pool.h>

module/zfs/refcount.c

@@ -24,7 +24,7 @@
  */
 
 #include <sys/zfs_context.h>
-#include <sys/refcount.h>
+#include <sys/zfs_refcount.h>
 
 /*
  * Reference count tracking is disabled by default.  It's memory requirements

module/zfs/rrwlock.c

@@ -26,7 +26,6 @@
  * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
-#include <sys/refcount.h>
 #include <sys/rrwlock.h>
 #include <sys/trace_zfs.h>
 

module/zfs/space_map.c

@@ -34,7 +34,6 @@
 #include <sys/dsl_pool.h>
 #include <sys/zio.h>
 #include <sys/space_map.h>
-#include <sys/refcount.h>
 #include <sys/zfeature.h>
 
 /*

module/zfs/vdev_indirect.c

@@ -27,7 +27,6 @@
 #include <sys/zio.h>
 #include <sys/zio_checksum.h>
 #include <sys/metaslab.h>
-#include <sys/refcount.h>
 #include <sys/dmu.h>
 #include <sys/vdev_indirect_mapping.h>
 #include <sys/dmu_tx.h>

module/zfs/vdev_initialize.c

@@ -27,7 +27,6 @@
 #include <sys/spa_impl.h>
 #include <sys/txg.h>
 #include <sys/vdev_impl.h>
-#include <sys/refcount.h>
 #include <sys/metaslab_impl.h>
 #include <sys/dsl_synctask.h>
 #include <sys/zap.h>

module/zfs/vdev_trim.c

@@ -29,7 +29,6 @@
 #include <sys/txg.h>
 #include <sys/vdev_impl.h>
 #include <sys/vdev_trim.h>
-#include <sys/refcount.h>
 #include <sys/metaslab_impl.h>
 #include <sys/dsl_synctask.h>
 #include <sys/zap.h>

module/zfs/zap.c

@@ -45,7 +45,6 @@
 #include <sys/zfs_znode.h>
 #include <sys/fs/zfs.h>
 #include <sys/zap.h>
-#include <sys/refcount.h>
 #include <sys/zap_impl.h>
 #include <sys/zap_leaf.h>
 

module/zfs/zap_micro.c

@@ -31,7 +31,6 @@
 #include <sys/dmu.h>
 #include <sys/zfs_context.h>
 #include <sys/zap.h>
-#include <sys/refcount.h>
 #include <sys/zap_impl.h>
 #include <sys/zap_leaf.h>
 #include <sys/avl.h>

module/zfs/zfs_fuid.c

@@ -26,7 +26,6 @@
 #include <sys/dmu.h>
 #include <sys/avl.h>
 #include <sys/zap.h>
-#include <sys/refcount.h>
 #include <sys/nvpair.h>
 #ifdef _KERNEL
 #include <sys/sid.h>