LU-9119 lnet: remove "struct' from generated comment

LU-9119 lnet: remove "struct' from generated comment

The CHECK_STRUCT() generates a comment saying
"Checks for struct " followed by the type name.
If the type name is 'struct mumble' the result
is "Checks for struct struct mumble". Drop the
extra "struct".

Test-Parameters: trivial testlist=sanity-lnet
Signed-off-by: Olaf Weber <olaf@sgi.com>
Signed-off-by: Olaf Weber <olaf.weber@hpe.com>
Change-Id: I90b13a2c500c63accb90ef567b197defd5521dea
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55507
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>