net: tulip: remove redundant assignment to variable new_csr6

Variable new_csr6 is being initialized with a value that is never
read, it is being re-assigned later on. The assignment is redundant
and can be removed.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220123183440.112495-1-colin.i.king@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>