misc: mic: cosm: cosm_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 header back down to a simple comment.

Fixes the following W=1 warnings:

 drivers/misc/mic/cosm/cosm_debugfs.c:25: warning: Function parameter or member 's' not described in 'log_buf_show'
 drivers/misc/mic/cosm/cosm_debugfs.c:25: warning: Function parameter or member 'unused' not described in 'log_buf_show'
 drivers/misc/mic/cosm/cosm_debugfs.c:78: warning: Function parameter or member 's' not described in 'force_reset_show'
 drivers/misc/mic/cosm/cosm_debugfs.c:78: warning: Function parameter or member 'pos' not described in 'force_reset_show'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200701083118.45744-18-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mic/cosm/cosm_debugfs.c

@@ -15,7 +15,7 @@
 /* Debugfs parent dir */
 static struct dentry *cosm_dbg;
 
-/**
+/*
  * log_buf_show - Display MIC kernel log buffer
  *
  * log_buf addr/len is read from System.map by user space
@@ -68,7 +68,7 @@ done:
 
 DEFINE_SHOW_ATTRIBUTE(log_buf);
 
-/**
+/*
  * force_reset_show - Force MIC reset
  *
  * Invokes the force_reset COSM bus op instead of the standard reset