misc: mic: host: mic_debugfs: Demote function headers from kerneldoc

The correct format is not used and no attempt has been made
to document the function arguments. Makes sense to just demote
the headers back down to simple comments.

Fixes the following W=1 warnings:

drivers/misc/mic/host/mic_debugfs.c:108: warning: Function parameter or member 'mdev' not described in 'mic_create_debug_dir'
drivers/misc/mic/host/mic_debugfs.c:131: warning: Function parameter or member 'mdev' not described in 'mic_delete_debug_dir'

Cc: Sudeep Dutt <[e-mail]>
Cc: Ashutosh Dixit <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/mic/host/mic_debugfs.c

···
 
 DEFINE_SHOW_ATTRIBUTE(mic_msi_irq_info);
 
-/**
+/*
  * mic_create_debug_dir - Initialize MIC debugfs entries.
  */
 void mic_create_debug_dir(struct mic_device *mdev)
···
 			    &mic_msi_irq_info_fops);
 }
 
-/**
+/*
  * mic_delete_debug_dir - Uninitialize MIC debugfs entries.
  */
 void mic_delete_debug_dir(struct mic_device *mdev)
···
 	debugfs_remove_recursive(mdev->dbg_dir);
 }
 
-/**
+/*
  * mic_init_debugfs - Initialize global debugfs entry.
  */
 void __init mic_init_debugfs(void)
···
 	mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
 }
 
-/**
+/*
  * mic_exit_debugfs - Uninitialize global debugfs entry
  */
 void mic_exit_debugfs(void)