net: Fix a warning added by 76ec988b

arm:  +   lsxhl
w+board/buffalo/lsxl/lsxl.c: In function 'rescue_mode':
w+board/buffalo/lsxl/lsxl.c:230:8: warning: unused variable 'enetaddr' [-Wunused-variable]
       arm:  +   lschlv2
w+board/buffalo/lsxl/lsxl.c: In function 'rescue_mode':
w+board/buffalo/lsxl/lsxl.c:230:8: warning: unused variable 'enetaddr' [-Wunused-variable]

Remove the unused variable.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>