ide: remove superfluous BUG_ON() from set_geometry_intr()

ide_set_handler() bugs on ->handler == NULL so no need to do it
in set_geometry_intr().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 994a516..0d0bf29 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -163,7 +163,6 @@
 	if (stat & (ERR_STAT|DRQ_STAT))
 		return ide_error(drive, "set_geometry_intr", stat);
 
-	BUG_ON(HWGROUP(drive)->handler != NULL);
 	ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 	return ide_started;
 }