ARM: dts: renesas: Add RZ/A1 platform code

Add platform code and DTs for Renesas RZ/A1 R7S72100 SoC.
Distinguishing feature of this SoC is that it has up to
10 MiB of on-SoC static RAM (SRAM).

The DTs are imported from Linux 5.0.11, commit d5a2675b207d .

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/mach-rmobile/Kconfig b/arch/arm/mach-rmobile/Kconfig
index babb5e9..a74f16d 100644
--- a/arch/arm/mach-rmobile/Kconfig
+++ b/arch/arm/mach-rmobile/Kconfig
@@ -22,9 +22,14 @@
 	imply CMD_MMC_SWRITE if MMC
 	imply SUPPORT_EMMC_RPMB if MMC
 
+config RZA1
+	prompt "Renesas ARM SoCs RZ/A1 (32bit)"
+	select CPU_V7A
+
 endchoice
 
 source "arch/arm/mach-rmobile/Kconfig.32"
 source "arch/arm/mach-rmobile/Kconfig.64"
+source "arch/arm/mach-rmobile/Kconfig.rza1"
 
 endif