doc: use correct debugfs mountpoint
doc: use correct debugfs mountpoint

Use the default mountpoint of debugfs in the pktcdvd ABI.

Signed-off-by: Shen Feng <ba51191cd9d28890339dabfae3100b9d0121a68d@cn.fujitsu.com>
Cc: <6b0bbb591baeb9ad6e7f8bd841a5a71d3b28abec@justmail.de>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs