ARM: at91: remove at91sam9260/at91sam9g20 legacy boards files

Remove old board files that use at91sam9260 or at91sam9g20 Atmel SoCs. The
device tree is mature on these SoCs. It must be used now.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --cc arch/arm/mach-at91/Makefile
Simple merge

diff --cc arch/arm/mach-at91/board-afeb-9260v1.c
Simple merge

diff --cc arch/arm/mach-at91/board-cam60.c
Simple merge

diff --cc arch/arm/mach-at91/board-cpu9krea.c
Simple merge

diff --cc arch/arm/mach-at91/board-flexibity.c
Simple merge

diff --cc arch/arm/mach-at91/board-gsia18s.c
Simple merge

diff --cc arch/arm/mach-at91/board-pcontrol-g20.c
Simple merge

diff --cc arch/arm/mach-at91/board-sam9-l9260.c
Simple merge

diff --cc arch/arm/mach-at91/board-sam9260ek.c
Simple merge

diff --cc arch/arm/mach-at91/board-sam9g20ek.c
Simple merge

diff --cc arch/arm/mach-at91/board-snapper9260.c
Simple merge

diff --cc arch/arm/mach-at91/board-stamp9g20.c
Simple merge

diff --cc arch/arm/mach-at91/stamp9g20.h
Simple merge