of: Constify of_changeset_entry function arguments

__of_changeset_entry_invert() and __of_changeset_entry_revert() don't
modify struct of_changeset_entry arguments, so they can be const.

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

drivers/of/dynamic.c

···
 	kfree(ce);
 }
 
-static void __of_changeset_entry_invert(struct of_changeset_entry *ce,
+static void __of_changeset_entry_invert(const struct of_changeset_entry *ce,
 					  struct of_changeset_entry *rce)
 {
 	memcpy(rce, ce, sizeof(*rce));
···
 	return 0;
 }
 
-static inline int __of_changeset_entry_revert(struct of_changeset_entry *ce)
+static inline int __of_changeset_entry_revert(const struct of_changeset_entry *ce)
 {
 	struct of_changeset_entry ce_inverted;