soc: renesas: Identify R-Car V4M

Add support for identifying the R-Car V4M (R8A779H0) SoC.
Signed-off-by: Duy Nguyen <duy.nguyen.rh@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/31e06d055aec1bc70c3e9a02f9268bcfc72b2204.1706194617.git.geert+renesas@glider.be

drivers/soc/renesas/Kconfig

@@ -277,6 +277,13 @@ config ARCH_R8A779G0
 	help
 	  This enables support for the Renesas R-Car V4H SoC.
 
+config ARCH_R8A779H0
+	bool "ARM64 Platform support for R-Car V4M"
+	select ARCH_RCAR_GEN4
+	select SYSC_R8A779H0
+	help
+	  This enables support for the Renesas R-Car V4M SoC.
+
 config ARCH_R8A774C0
 	bool "ARM64 Platform support for RZ/G2E"
 	select ARCH_RCAR_GEN3

drivers/soc/renesas/renesas-soc.c

@@ -270,6 +270,11 @@ static const struct renesas_soc soc_rcar_v4h __initconst __maybe_unused = {
 	.id	= 0x5c,
 };
 
+static const struct renesas_soc soc_rcar_v4m __initconst __maybe_unused = {
+	.family = &fam_rcar_gen4,
+	.id     = 0x5d,
+};
+
 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
 	.family	= &fam_shmobile,
 	.id	= 0x37,
@@ -380,6 +385,9 @@ static const struct of_device_id renesas_socs[] __initconst __maybe_unused = {
 #ifdef CONFIG_ARCH_R8A779G0
 	{ .compatible = "renesas,r8a779g0",	.data = &soc_rcar_v4h },
 #endif
+#ifdef CONFIG_ARCH_R8A779H0
+	{ .compatible = "renesas,r8a779h0",	.data = &soc_rcar_v4m },
+#endif
 #ifdef CONFIG_ARCH_R9A07G043
 #ifdef CONFIG_RISCV
 	{ .compatible = "renesas,r9a07g043",	.data = &soc_rz_five },