Unexport ufshcd_read_device_desc and ufshcd_read_string_desc there is no
really possibility to calling them directly outside of UFS context.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NSubhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>