intel_th: msu: Fix kernel-doc warnings

Correct function comments to prevent kernel-doc warnings
found when using "W=1".

msu.c:162: warning: Function parameter or struct member 'mbuf_priv' not described in 'msc'
msu.c:164: warning: Function parameter or struct member 'orig_addr' not described in 'msc'
msu.c:164: warning: Function parameter or struct member 'orig_sz' not described in 'msc'

Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Alexander Shishkin <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/hwtracing/intel_th/msu.c

···
  * @reg_base:		register window base address
  * @thdev:		intel_th_device pointer
  * @mbuf:		MSU buffer, if assigned
- * @mbuf_priv		MSU buffer's private data, if @mbuf
+ * @mbuf_priv:		MSU buffer's private data, if @mbuf
  * @win_list:		list of windows in multiblock mode
  * @single_sgt:		single mode buffer
  * @cur_win:		current window
···
  * @single_wrap:	single mode wrap occurred
  * @base:		buffer's base pointer
  * @base_addr:		buffer's base address
+ * @orig_addr:		MSC0 buffer's base address
+ * @orig_sz:		MSC0 buffer's size
  * @user_count:		number of users of the buffer
  * @mmap_count:		number of mappings
  * @buf_mutex:		mutex to serialize access to buffer-related bits