FileSys: Add forgotten docstrings.

src/core/file_sys/file_romfs.cpp

@@ -32,8 +32,8 @@ size_t File_RomFS::Read(const u64 offset, const u32 length, u8* buffer) const {
  * Write data to the file
  * @param offset Offset in bytes to start writing data to
  * @param length Length in bytes of data to write to file
- * @param buffer Buffer to write data from
  * @param flush The flush parameters (0 == do not flush)
+ * @param buffer Buffer to read data from
  * @return Number of bytes written
  */
 size_t File_RomFS::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {