opae-sdk: fix static code analysis issue  check buffer boundaries and may overflow buffer
issue: function 'strncpy' may incorrectly check buffer boundaries and may overflow buffer 'dfl_dev_str' of fixed size (256)
fix: replace 'strncpy'  with memcpy
@@ -536,7 +536,7 @@ fpga_result get_usrclk_uio(const char *sysfs_path,
res = FPGA_NOT_FOUND;
goto free;
}
- strncpy(dfl_dev_str, p, end - p);
+ memcpy(dfl_dev_str, p, end - p);
*(dfl_dev_str + (end - p)) = '\0';
ret = opae_uio_open(uio, dfl_dev_str);
