No need to strdup() again since the fscanf() function is already
allocating the variable. Just set the pointer to NULL so we "leak" our
variable to be saved in the settings.

Tested-by: Peter Senna Tschudin <peter.senna@linux.intel.com>
Reviewed-by: Peter Senna Tschudin <peter.senna@linux.intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/20250207231039.2883195-8-lucas.demarchi@intel.com


Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>