mpt fusion: convert to seq_file

Convert everything except ->proc_info() stuff, it is done within separate
->proc_info path series.

Problem with ->read_proc et al is described here commit
786d7e1612 "Fix rmmod/read/write races in
/proc entries"

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/message/fusion/mptbase.h

@@ -419,31 +419,6 @@ typedef struct _VirtDevice {
 #define MPT_TARGET_FLAGS_RAID_COMPONENT	0x40
 #define MPT_TARGET_FLAGS_LED_ON		0x80
 
-/*
- *	/proc/mpt interface
- */
-typedef struct {
-	const char	*name;
-	mode_t		 mode;
-	int		 pad;
-	read_proc_t	*read_proc;
-	write_proc_t	*write_proc;
-} mpt_proc_entry_t;
-
-#define MPT_PROC_READ_RETURN(buf,start,offset,request,eof,len) \
-do { \
-	len -= offset;			\
-	if (len < request) {		\
-		*eof = 1;		\
-		if (len <= 0)		\
-			return 0;	\
-	} else				\
-		len = request;		\
-	*start = buf + offset;		\
-	return len;			\
-} while (0)
-
-
 /*
  *	IOCTL structure and associated defines
  */