defconfig: msm: Enable usb2533 and LAN7500 drivers for 8937

Enable USB2533 and LAN7500 drivers to support LAN7500 usb-eth
adapter connected via USB2533 HUB.

CRs-Fixed: 2041232
Change-Id: I4d4cad8d738d4aed6e7a521fee287794ad064914
Signed-off-by: Arumuga Durai A <cadurai@codeaurora.org>