soc: renesas: Identify R-Car H3Ne-1.7G

Add support for identifying the R-Car H3Ne-1.7G (R8A779MB) SoC.

As this is a different grading of the already supported R-Car H3-N ES3.0
(R8A77951) SoC, support for it is enabled through the existing
ARCH_R8A77951 configuration symbol.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/8670482178567897571edc0dfc60017453544071.1656072871.git.geert+renesas@glider.be

drivers/soc/renesas/renesas-soc.c

@@ -320,6 +320,7 @@ static const struct of_device_id renesas_socs[] __initconst = {
 	{ .compatible = "renesas,r8a779m0",	.data = &soc_rcar_h3 },
 	{ .compatible = "renesas,r8a779m1",	.data = &soc_rcar_h3 },
 	{ .compatible = "renesas,r8a779m8",	.data = &soc_rcar_h3 },
+	{ .compatible = "renesas,r8a779mb",	.data = &soc_rcar_h3 },
 #endif
 #ifdef CONFIG_ARCH_R8A77960
 	{ .compatible = "renesas,r8a7796",	.data = &soc_rcar_m3_w },