PCI: epf-mhi: Enable HDMA for SA8775P SoC

SA8775P SoC supports Hyper DMA (HDMA) DMA Engine present in the DWC IP. So,
enable it in the EPF driver so that the DMA Engine APIs can be used for data
transfer.

[mani: reworded commit message]
Link: https://lore.kernel.org/linux-pci/20240318-dw-hdma-v5-5-f04c5cdde760@linaro.org
Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Frank Li <frank.li@nxp.com>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>

Author: Mrinmay Sarkar

drivers/pci/endpoint/functions/pci-epf-mhi.c

@@ -137,6 +137,7 @@ static const struct pci_epf_mhi_ep_info sa8775p_info = {
 	.epf_flags = PCI_BASE_ADDRESS_MEM_TYPE_32,
 	.msi_count = 32,
 	.mru = 0x8000,
+	.flags = MHI_EPF_USE_DMA,
 };
 
 struct pci_epf_mhi {