state: struct variable_type::import: remove const from node argument
This patch removes the const qualifier of the node argument from struct
variable_type::import. This is a preparation patch to support fixed strings in
state.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>