RedfishPkg/RedfishDiscoverDxe: USB Redfish host interface is not supported

RedfishPkg/RedfishDiscoverDxe: USB Redfish host interface is not supported

Host Interface details are described by the SMBIOS Type 42
table. The table is published by the RedfishHostInterfaceDxe
driver. That driver supports PCI-E and USB host interface
types.The table is consumed by the edfishGetHostInterfaceProtocolData
function in the RedfishDiscoverDxe driver. The function only supports
PCI-E host interface type.

Cc: Abner Chang <abner.chang@amd.com>
Cc: Nickle Wang <nickle.wang@hpe.com>
Signed-off-by: Igor Kulchytskyy <igork@ami.com>
Reviewed-by: Abner Chang <abner.chang@amd.com>