scsi: ufs: ufs-qcom: Drop unnecessary NULL checks

This code path is only called through one function, and the HBA struct is
already accessed in ufshcd_vops_dbg_register_dump() prior to calling so
there is no way for it to be NULL.

Likewise, the print_fn callback is always supplied within this driver and
is always provided.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Asutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>