RealView: Refactor the Ethernet device registration

This patch moves the Ethernet device registration from individual
realview_*.c files to core.c.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --cc arch/arm/mach-realview/core.c
Simple merge

diff --cc arch/arm/mach-realview/core.h
Simple merge

diff --cc arch/arm/mach-realview/realview_eb.c
Simple merge

diff --cc arch/arm/mach-realview/realview_pb1176.c
Simple merge

diff --cc arch/arm/mach-realview/realview_pb11mp.c
Simple merge

diff --cc arch/arm/mach-realview/realview_pba8.c
Simple merge