soc: renesas: Identify R-Car R8A779MD M3Le SoC

soc: renesas: Identify R-Car R8A779MD M3Le SoC

Add support for identifying the R-Car M3Le (R8A779MD) SoC.

The Renesas R-Car R8A779MD M3Le SoC is a variant of the already
supported R-Car M3-N SoC with reduced peripherals.
Enable support for the M3Le SoC through already existing ARCH_R8A77965
configuration symbol.  PRR reads 0x67c05501.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Link: https://patch.msgid.link/20260504144534.43745-6-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>