MAINTAINERS: correct typo in new NXP LAYERSCAPE GEN4

Commit 3edeb49525 ("dt-bindings: PCI: Add NXP Layerscape SoCs PCIe Gen4
controller") includes a new entry in MAINTAINERS, but slipped in a typo in
one of the file entries.

Hence, since then, ./scripts/get_maintainer.pl --self-test complains:

  warning: no file matches F: \
    drivers/pci/controller/mobibeil/pcie-layerscape-gen4.c

Correct the typo in PCI DRIVER FOR NXP LAYERSCAPE GEN4 CONTROLLER.

Link: https://lore.kernel.org/r/20200506052130.5780-1-lukas.bulwahn@gmail.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Rob Herring <robh@kernel.org>

MAINTAINERS

@@ -12941,7 +12941,7 @@ L:	linux-pci@vger.kernel.org
 L:	linux-arm-kernel@lists.infradead.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/pci/layerscape-pcie-gen4.txt
-F:	drivers/pci/controller/mobibeil/pcie-layerscape-gen4.c
+F:	drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
 
 PCI DRIVER FOR RENESAS R-CAR
 M:	Marek Vasut <marek.vasut+renesas@gmail.com>