MAINTAINERS: Add the Lantiq PEF2256 driver entry

After contributing the driver, add myself as the maintainer for the
Lantiq PEF2256 driver.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20231128132534.258459-6-herve.codina@bootlin.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -12028,6 +12028,14 @@ S:	Maintained
 F:	arch/mips/lantiq
 F:	drivers/soc/lantiq
 
+LANTIQ PEF2256 DRIVER
+M:	Herve Codina <herve.codina@bootlin.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
+F:	drivers/net/wan/framer/pef2256/
+F:	drivers/pinctrl/pinctrl-pef2256.c
+F:	include/linux/framer/pef2256.h
+
 LASI 53c700 driver for PARISC
 M:	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
 L:	linux-scsi@vger.kernel.org