netxen_nic: remove redundant assignment to variable capability

The variable capability is being assigned a value that is never
read and is being re-assigned later. The assignment is redundant and
can be removed. Also remove empty line before assignment to capability.

Cleans up clang scan build warning:
drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c:1189:2: warning:
Value stored to 'capability' is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240206115049.1879389-1-colin.i.king@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>