nvmetcli: support inline_data_size port parameter

nvmetcli: support inline_data_size port parameter

The port parameter attribute param_inline_data_size allows adjusting
the amount of inline data that can be included in a write IO. Setting
it to < 0 (or not setting it at all) allows the transport to choose a
reasonable default, which will be 0 if that transport does not support
inline.  Setting it to 0 disables the transport from using inline_data.
And setting it to > 0 configures that port/transport to use that inline
data size, in bytes, if the transport supports it.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>