rcar_gen3: plat: Rename RCAR_PRODUCT_* to PRR_PRODUCT_*

Rename RCAR_PRODUCT_* to PRR_PRODUCT_* and drop the duplicate
RCAR_PRODUCT_* macro.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: I6b2789790b85edb79c026f0860d70f323d113d96
13 files changed