mfd: tc3589x: Remove invalid use of kerneldoc syntax

Kerneldoc is for documenting function arguments and return values.

Prevents warnings like:

drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35890' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35892' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35893' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35894' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35895' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_TC35896' not described in enum 'tc3589x_version'
drivers/mfd/tc3589x.c:32: warning: Enum value 'TC3589X_UNKNOWN' not described in enum 'tc3589x_version'

Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/tc3589x.c

···
 #include <linux/mfd/tc3589x.h>
 #include <linux/err.h>
 
-/**
+/*
  * enum tc3589x_version - indicates the TC3589x version
  */
 enum tc3589x_version {