git: doc: Document the callout(9) difference in porting_drivers.txt

[Aaron LI]

commit 1868382f1145e7b352a07e026dbc884d9e3bcd11
Author: Aaron LI <aly at aaronly.me>
Date:   Mon Mar 17 13:01:16 2025 +0800

    doc: Document the callout(9) difference in porting_drivers.txt

Summary of changes:
 doc/porting_drivers.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/1868382f1145e7b352a07e026dbc884d9e3bcd11


-- 
DragonFly BSD source repository