USB: gsi: Use dma_get_sgtable() to update USB TRB ring and data buffer

IOVA address shall be contiguous in memory but physical address is
not guaranteed to be contiguous when USB SMMU s1 is enabled. Linux IPA
driver needs to use physical address to map it into its own context
bank if IPA SMMU s1 is enabled. Hence this change updates physical and
IOVA address related to USB TRB ring and its data buffer to Linux IPA
driver using dma_get_sgtable() API.

Change-Id: I7caef18903291e9a186dce691b64f387bf7f717e
Signed-off-by: Mayank Rana <mrana@codeaurora.org>