MAINTAINERS: repair Miquel Raynal's email address

Commit d70c6b02 ("MAINTAINERS: Add PL353 NAND controller entry") and
commit 813d5279 ("MAINTAINERS: Add PL353 SMC entry") adds Miquel
Raynal as maintainer with an obvious invalid email address, which can be
easily fixed.

Repair this copy-and-paste error in Miquel Raynal's email address.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210726144949.10439-1-lukas.bulwahn@gmail.com