ARM: rmobile: Introduce CONFIG_RCAR_64 symbol

Introduce common Kconfig symbol for 64bit R-Car platforms and move
common configuration options into it. This is preparatory patch to
prevent duplication of Kconfig lists later on, when Gen4 is added.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
1 file changed