power: remove redundant close of frequency file
power: remove redundant close of frequency file

Previous fix has addressed the incorrect handling of `base_frequency`
file, but has added a use-after-free error due to the fact that all
further code paths will lead to an `fclose()` call at the end, so the
additional `fclose()` call right after processing the file was
unnecessary.

Coverity issue: 369901
Fixes: 8a5febaac4f7 ("power: fix P-state base frequency handling")

Signed-off-by: Anatoly Burakov <814e00d8f6e4e81b7ccc7e3e5a0bfec0078f0203@intel.com>
Reviewed-by: Liang Ma <1f16df9adfb91fe9c30a4710437d99ad3f7092a2@liangbit.com>
Acked-by: David Hunt <763be7c8e0ad91e03160e7aed76d5cd41534e2f9@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk