efi: stmm: fix kernel-doc "bad line" warnings

Add a beginning " *" to each line to avoid kernel-doc warnings:

Warning: drivers/firmware/efi/stmm/mm_communication.h:34 bad line:
Warning: drivers/firmware/efi/stmm/mm_communication.h:113 bad line:
Warning: drivers/firmware/efi/stmm/mm_communication.h:130 bad line:

Fixes: c44b6be62e8d ("efi: Add tee-based EFI variable driver")
Signed-off-by: Randy Dunlap <[e-mail]>
Acked-by: Ilias Apalodimas <[e-mail]>
Signed-off-by: Ard Biesheuvel <[e-mail]>

drivers/firmware/efi/stmm/mm_communication.h

···
 
 /**
  * struct efi_mm_communicate_header - Header used for SMM variable communication
-
+ *
  * @header_guid:  header use for disambiguation of content
  * @message_len:  length of the message. Does not include the size of the
  *                header
···
 
 /**
  * struct smm_variable_communicate_header - Used for SMM variable communication
-
+ *
  * @function:     function to call in Smm.
  * @ret_status:   return status
  * @data:         payload
···
 /**
  * struct smm_variable_access - Used to communicate with StMM by
  *                              SetVariable and GetVariable.
-
+ *
  * @guid:         vendor GUID
  * @data_size:    size of EFI variable data
  * @name_size:    size of EFI name