nvmem: layouts: fix automatic module loading

To support loading of a layout module automatically the MODALIAS
variable in the uevent is needed. Add it.

Fixes: fc29fd82 ("nvmem: core: Rework layouts to become regular devices")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://lore.kernel.org/r/20250912131347.303345-2-srini@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>