msm: ipa: eth: Register upper interfaces with IPA

In certain modes of IPA operation (Ex. VLAN, MACSec, etc.), the upper
interface can be chosen by user space as the primary network device for
LAN management. Register IPA interface properties for immediate upper
interfaces in addition to the real interface.

Change-Id: I2b8c9f9e1ccfddaa0ff23fff16c331f0378ac1f3
Signed-off-by: Jinesh K. Jayakumar <jineshk@codeaurora.org>