platform/x86/intel/ifs: Remove unnecessary initialization of 'ret'

The ret variable is unconditionally assigned in ifs_load_firmware().
Therefore, remove its unnecessary initialization.

Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Link: https://lore.kernel.org/r/20240125130328.11253-1-ilpo.jarvinen@linux.intel.com


Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>