Clean up CSTYLEDs

69 CSTYLED BEGINs remain, appx. 30 of which can be removed if cstyle(1)
had a useful policy regarding
  CALL(ARG1,
  	ARG2,
  	ARG3);
above 2 lines. As it stands, it spits out *both*
  sysctl_os.c: 385: continuation line should be indented by 4 spaces
  sysctl_os.c: 385: indent by spaces instead of tabs
which is very cool

Another >10 could be fixed by removing "ulong" &al. handling.
I don't foresee anyone actually using it intentionally
(does it even exist in modern headers? why did it in the first place?).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12993

module/os/linux/zfs/arc_os.c

@@ -536,7 +536,5 @@ arc_prune_async(int64_t adjust)
 	mutex_exit(&arc_prune_mtx);
 }
 
-/* BEGIN CSTYLED */
 ZFS_MODULE_PARAM(zfs_arc, zfs_arc_, shrinker_limit, INT, ZMOD_RW,
 	"Limit on number of pages that ARC shrinker can reclaim at once");
-/* END CSTYLED */

module/os/linux/zfs/zfs_vnops_os.c

@@ -3995,9 +3995,8 @@ EXPORT_SYMBOL(zfs_putpage);
 EXPORT_SYMBOL(zfs_dirty_inode);
 EXPORT_SYMBOL(zfs_map);
 
-/* BEGIN CSTYLED */
+/* CSTYLED */
 module_param(zfs_delete_blocks, ulong, 0644);
 MODULE_PARM_DESC(zfs_delete_blocks, "Delete files larger than N blocks async");
-/* END CSTYLED */
 
 #endif

module/os/linux/zfs/zio_crypt.c

@@ -2051,9 +2051,8 @@ error:
 }
 
 #if defined(_KERNEL)
-/* BEGIN CSTYLED */
+/* CSTYLED */
 module_param(zfs_key_max_salt_uses, ulong, 0644);
 MODULE_PARM_DESC(zfs_key_max_salt_uses, "Max number of times a salt value "
 	"can be used for generating encryption keys before it is rotated");
-/* END CSTYLED */
 #endif

module/os/linux/zfs/zpl_file.c

@@ -1100,8 +1100,7 @@ const struct file_operations zpl_dir_file_operations = {
 #endif
 };
 
-/* BEGIN CSTYLED */
+/* CSTYLED */
 module_param(zfs_fallocate_reserve_percent, uint, 0644);
 MODULE_PARM_DESC(zfs_fallocate_reserve_percent,
-    "Percentage of length to use for the available capacity check");
-/* END CSTYLED */
+	"Percentage of length to use for the available capacity check");