MdeModulePkg: Make the DEBUG info consistent in SNP driver.

SNP driver will print the UNDI returned StatFlags:StatCode with DEBUG macro,
while in some please it uses the reverse order (StatCode:StatFlags). This patch
is to make the print info consistent, that StatFlags always come first.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>

MdeModulePkg/Universal/Network/SnpDxe/Get_status.c

@@ -85,7 +85,7 @@ PxeGetStatus (
       (EFI_D_NET,
       "\nSnp->undi.get_status()  %xh:%xh\n",
       Snp->Cdb.StatFlags,
-      Snp->Cdb.StatFlags)
+      Snp->Cdb.StatCode)
       );
 
     return EFI_DEVICE_ERROR;