LU-15069 llite: Remove ras_set_start

LU-15069 llite: Remove ras_set_start

ras_set_start is a one line function and serves only to
obfuscate how simple "set_start" actually is.

Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I95d0b891ea2c88354dcb9e5b5a205cafa19380c7
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/45652
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>