arm: mvebu: ds414: Config header mini-review

arm: mvebu: ds414: Config header mini-review

A few minor changes:

* Get rid of leftover comments, other commits removed the defines they
  referred to.

* CONFIG_SYS_NETA_INTERFACE_TYPE is not used anymore since commit
  e3b9c98a23ca9 ("net: mvneta: Convert to driver model").

* Drop CONFIG_USB_MAX_CONTROLLER_COUNT: it is per-HCI type, so XHCI and
  EHCI could still both work be used.

* Unconditionally define CONFIG_EHCI_IS_TDI: it has no effect on XHCI so
  that conditional doesn't make any sense.

* Define a larger PHY_ANEG_TIMEOUT: In my test bed, the NIC is directly
  connected to some RTL8111 and the default 8s timeout was often too
  short.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Stefan Roese <sr@denx.de>