ide: remove ata_nsector_t, ata_data_t and atapi_bcount_t

Remove ata_nsector_t, ata_data_t (unused) and atapi_bcount_t.

While at it:
* replace 'HWIF(drive)' by 'hwif'

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

include/linux/ide.h

@@ -315,26 +315,6 @@ typedef union {
 	} b;
 } special_t;
 
-/*
- * ATA DATA Register Special.
- * ATA NSECTOR Count Register().
- * ATAPI Byte Count Register.
- */
-typedef union {
-	unsigned all			:16;
-	struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-		unsigned low		:8;	/* LSB */
-		unsigned high		:8;	/* MSB */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-		unsigned high		:8;	/* MSB */
-		unsigned low		:8;	/* LSB */
-#else
-#error "Please fix <asm/byteorder.h>"
-#endif
-	} b;
-} ata_nsector_t, ata_data_t, atapi_bcount_t;
-
 /*
  * ATA-IDE Select Register, aka Device-Head
  *