of: Move the request module helper logic to module.c

of: Move the request module helper logic to module.c

Depending on device.c for pure OF handling is considered
backwards. Let's extract the content of of_device_request_module() to
have the real logic under module.c.

The next step will be to convert users of of_device_request_module() to
use the new helper.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230404172148.82422-11-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>