net: rtl8139: Minor cleanup of rtl_disable()

Rename the function to rtl8139_stop(), clean up checkpatch errors in
the stop polling function. No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
1 file changed