MAINTAINERS: adjust file entry in MEDIATEK DMA DRIVER

Commit fa340050 ("dt-bindings: dma: convert MediaTek High-Speed
controller to the json-schema")  converts mtk-hsdma.txt to
mediatek,mt7622-hsdma.yaml, but misses to adjust its reference in
MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken reference.

Repair this file reference in MEDIATEK DMA DRIVER.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20240222135847.5160-1-lukas.bulwahn@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

MAINTAINERS

@@ -13664,7 +13664,7 @@ L:	dmaengine@vger.kernel.org
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
-F:	Documentation/devicetree/bindings/dma/mtk-*
+F:	Documentation/devicetree/bindings/dma/mediatek,*
 F:	drivers/dma/mediatek/
 
 MEDIATEK ETHERNET DRIVER