usb: dwc3: dwc3-msm: Export msm_data_fifo_config() for QDSS

Since f_qdss is compiled as a module, it is dependent on
msm_data_fifo_config() being exported to avoid an undefined reference
compilation error.

Change-Id: I41155fe7af14c8e4003841f54ef878d3535d33d7
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>