ide: unexport ide_hwifs[]

All modular users have been fixed to not reference ide_hwifs[] directly.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide.c

@@ -100,13 +100,8 @@ int ide_noacpitfs = 1;
 int ide_noacpionboot = 1;
 #endif
 
-/*
- * This is declared extern in ide.h, for access by other IDE modules:
- */
 ide_hwif_t ide_hwifs[MAX_HWIFS];	/* master data repository */
 
-EXPORT_SYMBOL(ide_hwifs);
-
 static void ide_port_init_devices_data(ide_hwif_t *);
 
 /*