ixgbe: rename VF message type macros

DPDK commit message

There is name similarity within IXGBE_VT_MSGTYPE_ACK and
PFMAILBOX.ACK / VFMAILBOX.ACK which may cause confusion. Rename MSGTYPE
macros to SUCCESS and FAILURE as they are not specified in datasheet and
now will be easily distinguishable.

Signed-off-by: Jakub Chylkowski <jakubx.chylkowski@intel.com>
Reviewed-by: Marek Zalfresso-jundzillo <marekx.zalfresso-jundzillo@intel.com>
Reviewed-by: Alice Michael <alice.michael@intel.com>
Reviewed-by: Piotr Skajewski <piotrx.skajewski@intel.com>
Reviewed-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
Tested-by: Piotr Skajewski <piotrx.skajewski@intel.com>
Tested-by: Alice Michael <alice.michael@intel.com>

Obtained from: DPDK (4f675c9)
MFC after: 1 week