dt-bindings: mtd: nand-controller: Fix a comment in the examples

dt-bindings: mtd: nand-controller: Fix a comment in the examples

BugLink: https://bugs.launchpad.net/bugs/1969110
commit 0e7f1b557974ce297e5e4c9d4245720fbb489886 upstream.

The controller properties should be in the controller 'parent' node,
while properties in the children nodes are specific to the NAND
*chip*. This error was already present during the yaml conversion.

Fixes: 2d472aba15ff ("mtd: nand: document the NAND controller/NAND chip DT representation")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-3-miquel.raynal@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit c19a9d30784493b0fbdba59332725b866349230c)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>