dm ioctl: fix a couple ioctl codes

Change the ioctl codes from DM_DEV_ARM_POLL to DM_DEV_ARM_POLL_CMD and
from DM_GET_TARGET_VERSION to DM_GET_TARGET_VERSION_CMD.

Note that the "cmd" field of "struct _ioctls" is never used, thus this
commit doesn't fix any bug, it just makes the code consistent.

Signed-off-by: Mikulas Patocka <[e-mail]>
Signed-off-by: Mike Snitzer <[e-mail]>

drivers/md/dm-ioctl.c

···
 
 		{DM_TARGET_MSG_CMD, 0, target_message},
 		{DM_DEV_SET_GEOMETRY_CMD, 0, dev_set_geometry},
-		{DM_DEV_ARM_POLL, IOCTL_FLAGS_NO_PARAMS, dev_arm_poll},
-		{DM_GET_TARGET_VERSION, 0, get_target_version},
+		{DM_DEV_ARM_POLL_CMD, IOCTL_FLAGS_NO_PARAMS, dev_arm_poll},
+		{DM_GET_TARGET_VERSION_CMD, 0, get_target_version},
 	};
 
 	if (unlikely(cmd >= ARRAY_SIZE(_ioctls)))