MAINTAINERS: update aspeed,i2c.yaml reference

Changeset 810e4441 ("dt-bindings: aspeed-i2c: Convert txt to yaml format")
renamed: Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
to: Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml.

Update its cross-reference accordingly.

Fixes: 810e4441 ("dt-bindings: aspeed-i2c: Convert txt to yaml format")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/02d5ddbccdba665901221b9a2ff512e23f9aa4c5.1634630486.git.mchehab+huawei@kernel.org

MAINTAINERS

@@ -1746,7 +1746,7 @@ R:	Joel Stanley <joel@jms.id.au>
 L:	linux-i2c@vger.kernel.org
 L:	openbmc@lists.ozlabs.org (moderated for non-subscribers)
 S:	Maintained
-F:	Documentation/devicetree/bindings/i2c/i2c-aspeed.txt
+F:	Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2400-i2c-ic.txt
 F:	drivers/i2c/busses/i2c-aspeed.c
 F:	drivers/irqchip/irq-aspeed-i2c-ic.c