This patch adds support for Commands Supported and Effects log page
(Log Identifier 05h) for NVMeOF. This also makes it easier to find
which commands are supported, e.g. :-

subnqn    : testnqn1
Admin Command Set
ACS2     [Get Log Page                    ] 00000001
ACS6     [Identify                        ] 00000001
ACS8     [Abort                           ] 00000001
ACS9     [Set Features                    ] 00000001
ACS10    [Get Features                    ] 00000001
ACS12    [Asynchronous Event Request      ] 00000001
ACS24    [Keep Alive                      ] 00000001

NVM Command Set
IOCS0    [Flush                           ] 00000001
IOCS1    [Write                           ] 00000001
IOCS2    [Read                            ] 00000001
IOCS8    [Write Zeroes                    ] 00000001
IOCS9    [Dataset Management              ] 00000001

This partticular functionality can be used from the host side to examine
the NVMeOF ctrl commands supported.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>