include/linux/hdreg.h: remove unused defines

* Move HD_IRQ define to drivers/block/hd.c (only user).

* Remove unused *_STAT, *_ERR, HD_*, CD, IO, REL and TAG_MASK defines.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 482c0c4..3c11f06 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -42,6 +42,8 @@
 #include <linux/ata.h>
 #include <linux/hdreg.h>
 
+#define HD_IRQ 14
+
 #define REALLY_SLOW_IO
 #include <asm/system.h>
 #include <asm/io.h>