dt-bindings: mtd: partitions: Fix partition node name pattern

The 'partition' node name pattern is missing start and end anchors, so
anything is allowed before or after the regex pattern. There's no in tree
users needing that, so add anchors to the pattern.

Signed-off-by: Rob Herring <[email protected]>
Reviewed-by: Pratyush Yadav <[email protected]>
Reviewed-by: Dhruva Gole <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

Author: robherring

Documentation/devicetree/bindings/mtd/partitions/partitions.yaml

@@ -32,7 +32,7 @@ properties:
     enum: [1, 2]
 
 patternProperties:
-  "partition(-.+|@[0-9a-f]+)":
+  "^partition(-.+|@[0-9a-f]+)$":
     $ref: partition.yaml
 
 required: