Add OF_prop_free function as a counterpart for OF_*prop_alloc

- Introduce new OF API function OF_prop_free to free memory allocated by
  OF_getprop_alloc and OF_getencprop_alloc. Current code just calls free(9)
  with M_OFWPROP memory class which assumes knowledge about OF_*prop_alloc
  functions' internals and leads to unneccessary code coupling

- Convert some of the free(..., M_OFWPROP) instances to OF_prop_free

Files affected by this commit are the ones I was able to test on real
hardware. The rest of free(..., M_OFWPROP) instances will be handled with
idividual maintainers

Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D6315

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/dev/fdt/fdt_common.c b/sys/dev/fdt/fdt_common.c
index 73f7ada..4e0d6e2 100644
--- a/sys/dev/fdt/fdt_common.c
+++ b/sys/dev/fdt/fdt_common.c
@@ -348,7 +348,7 @@ fdt_is_enabled(phandle_t node)
 	if (strncmp((char *)stat, "okay", len) == 0)
 		ena = 1;
 
-	free(stat, M_OFWPROP);
+	OF_prop_free(stat);
 	return (ena);
 }
 
@@ -519,7 +519,7 @@ fdt_reg_to_rl(phandle_t node, struct resource_list *rl)
 	rv = 0;
 
 out:
-	free(regptr, M_OFWPROP);
+	OF_prop_free(regptr);
 	return (rv);
 }
 
@@ -734,4 +734,4 @@ fdt_get_chosen_bootargs(char *bootargs, size_t max_size)
 	if (OF_getprop(chosen, "bootargs", bootargs, max_size) == -1)
 		return (ENXIO);
 	return (0);
-}
\ No newline at end of file
+}