ARM: renesas: Add R8A77980 V3HSK board and CPLD code

Add board code for the R8A77980 V3HSK board.
Add CPLD sysreset driver to the R-Car V3H 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 V3H Condor, squash CPLD driver in]
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index dd917ae..4b19a93 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1052,6 +1052,7 @@
 	r8a77970-eagle-u-boot.dtb \
 	r8a77970-v3msk-u-boot.dtb \
 	r8a77980-condor-u-boot.dtb \
+	r8a77980-v3hsk-u-boot.dtb \
 	r8a77990-ebisu-u-boot.dtb \
 	r8a77995-draak-u-boot.dtb