Boost Windows Mobile 5 performance up to 20 percent

[HKLM\System\StorageManager\FATFS]
CacheSize = 4096
EnableCache = 1

[HKLM\System\StorageManager\Filters\fsreplxfilt]
ReplStoreCacheSize = 4096

Soft reset for changes to take effect.
Default values for all keys are 0

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