staging: vme_user: remove unnecessary NULL initialization before list iteration

staging: vme_user: remove unnecessary NULL initialization before list iteration

Remove redundant NULL initialization for list iterator because
variables used as iterators in list_for_each_entry() do not require
initialization, as the macro assigns them before first use.

No functional change.

Signed-off-by: Shyam Sunder Reddy Padira <shyamsunderreddypadira@gmail.com>
Link: https://patch.msgid.link/20260505192320.107936-1-shyamsunderreddypadira@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>