Platforms/RaspberryPi: Fix SMBIOS Type 9

FWTS reports an error with SMBIOS Type 9 Segment-Bus-DevFunc fields.
The SMBIOS specification requires that for non-PCIe slot devices to have
these fields reported as 0xFFFFF-0xFF-xFF. Instead, they were being
reported as 0x0000-0x00-0x00.

This fixes the FWTS SMBIOS Type 9 failure reported here:
pftf/RPi4#75

Signed-off-by: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@arm.com>
Reviewed-by: Andrei Warkentin <awarkentin@vmware.com>

Platform/RaspberryPi/Drivers/PlatformSmbiosDxe/PlatformSmbiosDxe.c

@@ -380,9 +380,9 @@ SMBIOS_TABLE_TYPE9  mSysSlotInfoType9 = {
     0,  // SmbusSignalSupported    :1;
     0,  // Reserved                :5;  ///< Set to 0.
   },
-  0,    // SegmentGroupNum;
-  0,    // BusNum;
-  0,    // DevFuncNum;
+  0xFFFF, // SegmentGroupNum;
+  0xFF,   // BusNum;
+  0xFF,   // DevFuncNum;
 };
 CHAR8 *mSysSlotInfoType9Strings[] = {
   "SD Card",