ANDROID: disable 2 ethernet drivers from arm32 build

Right now both the sfc and aquantia drivers are failing to build in
Linus's tree with the following errors:
	ERROR: modpost: "__aeabi_uldivmod" [drivers/net/ethernet/sfc/sfc.ko] undefined!
	ERROR: modpost: "__bad_udelay" [drivers/net/ethernet/aquantia/atlantic/atlantic.ko] undefined!

Fix this for now by disabling building these drivers on arm32.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: If849576f4cab9a35ea4a7998853f9ee37346a0fd