[patch] MdeModulePkg/NonDiscoverablePciDevice: Remove the redundant check

[Dandan Bi <dandan.bi@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1422

if (Attributes) {
  if ((Attributes & (~(DEV_SUPPORTED_ATTRIBUTES))) != 0) {
    return EFI_UNSUPPORTED;
  }
}
In above code block,
"If ((Attributes & (~(DEV_SUPPORTED_ATTRIBUTES))) != 0)" is TRUE,
the Attributes must be not 0. So we can remove the redundant
check "if (Attributes)".

Cc: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
---
 .../NonDiscoverablePciDeviceIo.c                          | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.c b/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.c
index f0d3472ea5..2be8b36acc 100644
--- a/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.c
+++ b/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.c
@@ -1274,15 +1274,13 @@ PciIoAttributes (
   #define DEV_SUPPORTED_ATTRIBUTES \
     (EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE)
 
   Dev = NON_DISCOVERABLE_PCI_DEVICE_FROM_PCI_IO(This);
 
-  if (Attributes) {
-      if ((Attributes & (~(DEV_SUPPORTED_ATTRIBUTES))) != 0) {
-        return EFI_UNSUPPORTED;
-      }
-    }
+  if ((Attributes & (~(DEV_SUPPORTED_ATTRIBUTES))) != 0) {
+    return EFI_UNSUPPORTED;
+  }
 
   Enable = FALSE;
   switch (Operation) {
   case EfiPciIoAttributeOperationGet:
     if (Result == NULL) {
-- 
2.18.0.windows.1