ARM: shmobile: Break out R-Car Gen2 setup code

Move arch timer workaround code and boot mode pin
handling from setup-r8a7790.c to setup-rcar-gen2.c.

With this in place the same code can be used on
other R-Car Generation 2 devices such as r8a7791.

Signed-off-by: Magnus Damm <damm@opensource.se>
[horms+renesas@verge.net.au trivial rebase of board-lager.c
 for introduction of lager_add_standard_devices()]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

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

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

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

diff --cc arch/arm/mach-shmobile/clock-r8a7790.c
Simple merge

diff --cc arch/arm/mach-shmobile/include/mach/r8a7790.h
Simple merge

diff --cc arch/arm/mach-shmobile/include/mach/rcar-gen2.h
Simple merge

diff --cc arch/arm/mach-shmobile/setup-r8a7790.c
Simple merge

diff --cc arch/arm/mach-shmobile/setup-rcar-gen2.c
Simple merge