ARM: at91: remove useless map_io

Now that the SRAM is initialized by the mmio-sram driver, .map_io is useless.
remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --cc arch/arm/mach-at91/at91rm9200.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9260.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9261.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9263.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9g45.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9n12.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9rl.c
Simple merge

diff --cc arch/arm/mach-at91/at91sam9x5.c
Simple merge

diff --cc arch/arm/mach-at91/sama5d3.c
Simple merge