ARM: shmobile: Make r8a73a4 Arch timer optional

Update the r8a73a4 code to allow using other
timers than Arch timer for clock event

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --cc arch/arm/mach-shmobile/Kconfig
Simple merge

diff --cc arch/arm/mach-shmobile/board-ape6evm.c
Simple merge

diff --cc arch/arm/mach-shmobile/include/mach/r8a73a4.h
Simple merge

diff --cc arch/arm/mach-shmobile/setup-r8a73a4.c
Simple merge