net: mdio-octeon: Fix Kconfig warnings and build errors

After commit 171a9bae68c7 ("staging/octeon: Allow test build on
!MIPS"), the following combination of configs cause a few Kconfig
warnings and build errors (distilled from arm allyesconfig and Randy's
randconfig builds):

    CONFIG_NETDEVICES=y
    CONFIG_STAGING=y
    CONFIG_COMPILE_TEST=y

and CONFIG_OCTEON_ETHERNET as either a module or built-in.

WARNING: unmet direct dependencies detected for MDIO_OCTEON
  Depends on [n]: NETDEVICES [=y] && MDIO_DEVICE [=y] && MDIO_BUS [=y]
&& 64BIT [=n] && HAS_IOMEM [=y] && OF_MDIO [=n]
  Selected by [y]:
  - OCTEON_ETHERNET [=y] && STAGING [=y] && (CAVIUM_OCTEON_SOC ||
COMPILE_TEST [=y]) && NETDEVICES [=y]

In file included from ../drivers/net/phy/mdio-octeon.c:14:
../drivers/net/phy/mdio-cavium.h:111:36: error: implicit declaration of
function ‘writeq’; did you mean ‘writel’?
[-Werror=implicit-function-declaration]
  111 | #define oct_mdio_writeq(val, addr) writeq(val, (void *)addr)
      |                                    ^~~~~~

CONFIG_64BIT is not strictly necessary if the proper readq/writeq
definitions are included from io-64-nonatomic-lo-hi.h.

CONFIG_OF_MDIO is not needed when CONFIG_COMPILE_TEST is enabled because
of commit f9dc9ac51610 ("of/mdio: Add dummy functions in of_mdio.h.").

Fixes: 171a9bae68c7 ("staging/octeon: Allow test build on !MIPS")
Reported-by: kbuild test robot <[email protected]>
Reported-by: Mark Brown <[email protected]>
Reported-by: Randy Dunlap <[email protected]>
Signed-off-by: Nathan Chancellor <[email protected]>
Acked-by: Randy Dunlap <[email protected]> # build-tested
Signed-off-by: David S. Miller <[email protected]>

0 files changed, 0 insertions, 0 deletions