ARM: renesas: Rename ARCH_RMOBILE_BOARD_STRING to ARCH_RENESAS_BOARD_STRING

Rename ARCH_RMOBILE_BOARD_STRING to ARCH_RENESAS_BOARD_STRING
because all the chips are made by Renesas, while only a subset
of them is from the R-Mobile line.

Use the following command to perform the rename:

"
$ git grep -l 'ARCH_RMOBILE_BOARD_STRING' | \
  xargs -I {} sed -i 's@ARCH_RMOBILE_BOARD_STRING@ARCH_RENESAS_BOARD_STRING@g' {}
"

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
diff --git a/arch/arm/mach-rmobile/Kconfig.32 b/arch/arm/mach-rmobile/Kconfig.32
index f7079a2..b546e09 100644
--- a/arch/arm/mach-rmobile/Kconfig.32
+++ b/arch/arm/mach-rmobile/Kconfig.32
@@ -1,6 +1,6 @@
 if RCAR_32
 
-config ARCH_RMOBILE_BOARD_STRING
+config ARCH_RENESAS_BOARD_STRING
 	string "Renesas RCar Gen2 board name"
 	default "Board"