net: Add SYS_FAULT_MII_ADDR to Kconfig
The support found under SYS_FAULT_ECHO_LINK_DOWN requires that the
SYS_FAULT_MII_ADDR symbol also be set. This wasn't previously found in
Kconfig, so add it now.
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
authored by