The value for LINUX_STORAGE_SIZE was defined inconsistently against the one
defined for Linux boards in HAL_STORAGE_SIZE. That led to some values not
being written to the storage when running the test binary built at
libraries/StorageManager/examples/StorageTest.
Support for File System starage mode is retained, appropriate Storage
mode can be set by defining USE_FS_STORAGE for File System storage
aand US_FRAM_STORAGE for FRAM storage. Note: FS storage and FRAM
storage are never synced as of now.