MdeModulePkg: Fix incorrect EfiPciWidth* enum literals

In arguments of EFI_PCI_IO_PROTOCOL member functions, replace the
EfiPciWidth* enum literals from
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH with the matching
EfiPciIoWidth* values from EFI_PCI_IO_PROTOCOL_WIDTH.

This keeps the call sites aligned with the protocol they actually use.
The old values were copied from EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL code,
so they obscured the intent of the calls and relied on an explicit
cast.

This mimics commit 8ba64a9a94 ("UefiPayloadPkg: Fix build failure with
CLANGPDB").

Generated by coccinelle script.

``` smpl
@initialize:python@
@@

def to_pci_io_width(name):
    return name.replace("EfiPciWidth", "EfiPciIoWidth", 1)

@normalize@
typedef EFI_PCI_IO_PROTOCOL;
typedef EDKII_PCI_DEVICE_PPI;
type T =~ "^EFI_PCI_IO_PROTOCOL_WIDTH$";
EFI_PCI_IO_PROTOCOL *x;
EDKII_PCI_DEVICE_PPI *y;
identifier bad =~ "EfiPciWidth(Uint|FifoUint|FillUint)(8|16|32|64)";
identifier top_op =~ "^(PollMem|PollIo|CopyMem)$";
identifier space =~ "^(Mem|Io|Pci)$";
identifier rw =~ "^(Read|Write)$";
fresh identifier good = script:python(bad) { to_pci_io_width(bad) };
expression first;
expression list rest;
@@
(
  x->top_op
|
  y->PciIo.top_op
|
  x->space.rw
|
  y->PciIo.space.rw
) (
  first,
- (T)bad
+ good
  ,
  rest
  )
```

Verified with:
- `build -p MdeModulePkg/MdeModulePkg.dsc -m MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf -a IA32 -b DEBUG -t GCC`
- `build -p MdeModulePkg/MdeModulePkg.dsc -m MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf -a X64 -b DEBUG -t GCC`

Signed-off-by: Mingjie Shen <shen497@purdue.edu>

MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c

@@ -598,7 +598,7 @@ RomDecode (
     Value32 = RomBar | 0x1;
     PciIo->Pci.Write (
                  PciIo,
-                 (EFI_PCI_IO_PROTOCOL_WIDTH)EfiPciWidthUint32,
+                 EfiPciIoWidthUint32,
                  RomBarIndex,
                  1,
                  &Value32
@@ -630,7 +630,7 @@ RomDecode (
     Value32 = 0xFFFFFFFE;
     PciIo->Pci.Write (
                  PciIo,
-                 (EFI_PCI_IO_PROTOCOL_WIDTH)EfiPciWidthUint32,
+                 EfiPciIoWidthUint32,
                  RomBarIndex,
                  1,
                  &Value32