ARM: renesas: Add R8A77970 V3MSK board and CPLD code

Add board code for the R8A77970 V3MSK board.
Add CPLD sysreset driver to the R-Car V3M SK board.
Extracted from a larger patch by Valentine Barshak.

Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Tam Nguyen <tam.nguyen.xa@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
[Marek: Sync configs and board code with V3M Eagle, squash CPLD driver in]
diff --git a/arch/arm/mach-rmobile/Kconfig.rcar3 b/arch/arm/mach-rmobile/Kconfig.rcar3
index 5f33821..46d2742 100644
--- a/arch/arm/mach-rmobile/Kconfig.rcar3
+++ b/arch/arm/mach-rmobile/Kconfig.rcar3
@@ -111,6 +111,11 @@
 	help
           Support for Renesas R-Car Gen3 Eagle platform
 
+config TARGET_V3MSK
+	bool "V3MSK board"
+	help
+          Support for Renesas R-Car Gen3 V3MSK platform
+
 config TARGET_EBISU
 	bool "Ebisu board"
 	imply R8A77990
@@ -166,6 +171,7 @@
 source "board/renesas/ebisu/Kconfig"
 source "board/renesas/salvator-x/Kconfig"
 source "board/renesas/ulcb/Kconfig"
+source "board/renesas/v3msk/Kconfig"
 source "board/beacon/beacon-rzg2m/Kconfig"
 source "board/hoperun/hihope-rzg2/Kconfig"
 source "board/silinux/ek874/Kconfig"