of: reserved_mem: Fix placement of __free() annotation

of: reserved_mem: Fix placement of __free() annotation

The __free() annotation was incorrectly placed before the variable
name instead of after it, which resulted in the following checkpatch
errors:

ERROR: need consistent spacing around '*' (ctx:WxV)
+       struct device_node __free(device_node) *target = of_parse_phandle(np, "memory-region", idx);
                                               ^
WARNING: function definition argument 'idx' should also have an identifier name
+       struct device_node __free(device_node) *target = of_parse_phandle(np, "memory-region", idx);

As part of this cleanup, also remove the useless return statement
flagged by checkpatch.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://patch.msgid.link/20260107-mtd-memregion-v3-1-f9fc9107b992@bootlin.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>