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/spl/spl-err.c

@@ -32,11 +32,10 @@
  * analysis and other such goodies.
  * But we would still default to the current default of not to do that.
  */
-/* BEGIN CSTYLED */
 unsigned int spl_panic_halt;
+/* CSTYLED */
 module_param(spl_panic_halt, uint, 0644);
 MODULE_PARM_DESC(spl_panic_halt, "Cause kernel panic on assertion failures");
-/* END CSTYLED */
 
 void
 spl_dumpstack(void)