[efi] Update to current EDK2 headers

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/efi/Base.h

 #endif
 
 //
-// For symbol name in GNU assembly code, an extra "_" is necessary
+// For symbol name in assembly code, an extra "_" is sometimes necessary
 //
-#if defined(__GNUC__)
-  ///
-  /// Private worker functions for ASM_PFX()
-  ///
-  #define _CONCATENATE(a, b)  __CONCATENATE(a, b)
-  #define __CONCATENATE(a, b) a ## b
 
-  ///
-  /// The __USER_LABEL_PREFIX__ macro predefined by GNUC represents the prefix
-  /// on symbols in assembly language.
-  ///
-  #define ASM_PFX(name) _CONCATENATE (__USER_LABEL_PREFIX__, name)
-#endif
+///
+/// Private worker functions for ASM_PFX()
+///
+#define _CONCATENATE(a, b)  __CONCATENATE(a, b)
+#define __CONCATENATE(a, b) a ## b
+
+///
+/// The __USER_LABEL_PREFIX__ macro predefined by GNUC represents the prefix
+/// on symbols in assembly language.
+///
+#define ASM_PFX(name) _CONCATENATE (__USER_LABEL_PREFIX__, name)
 
 #if __APPLE__
   //

src/include/ipxe/efi/Ia32/ProcessorBind.h

 **/
 #define FUNCTION_ENTRY_POINT(FunctionPointer) (VOID *)(UINTN)(FunctionPointer)
 
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__ _
+#endif
+
 #endif
 

src/include/ipxe/efi/IndustryStandard/Pci22.h

     PCI-to-PCI Bridge Architecture Specification, Revision 1.2
     PC Card Standard, 8.0
 
+
+
   Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
   UINT8                   Data;
 } EFI_PCI_CAPABILITY_PMI;
 
+///
+/// PMC - Power Management Capabilities
+/// Section 3.2.3, PCI Power Management Interface Specifiction, Revision 1.2
+///
+typedef union {
+  struct {
+    UINT16 Version : 3;
+    UINT16 PmeClock : 1;
+    UINT16 : 1;
+    UINT16 DeviceSpecificInitialization : 1;
+    UINT16 AuxCurrent : 3;
+    UINT16 D1Support : 1;
+    UINT16 D2Support : 1;
+    UINT16 PmeSupport : 5;
+  } Bits;
+  UINT16 Data;
+} EFI_PCI_PMC;
+
+#define EFI_PCI_PMC_D3_COLD_MASK    (BIT15)
+
+///
+/// PMCSR - Power Management Control/Status
+/// Section 3.2.4, PCI Power Management Interface Specifiction, Revision 1.2
+///
+typedef union {
+  struct {
+    UINT16 PowerState : 2;
+    UINT16 : 6;
+    UINT16 PmeEnable : 1;
+    UINT16 DataSelect : 4;
+    UINT16 DataScale : 2;
+    UINT16 PmeStatus : 1;
+  } Bits;
+  UINT16 Data;
+} EFI_PCI_PMCSR;
+
 ///
 /// A.G.P Capability
 /// Section 6.1.4, Accelerated Graphics Port Interface Specification, Revision 1.0

src/include/ipxe/efi/X64/ProcessorBind.h

 **/
 #define FUNCTION_ENTRY_POINT(FunctionPointer) (VOID *)(UINTN)(FunctionPointer)
 
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__
+#endif
+
 #endif
 

src/include/ipxe/efi/import.pl

 	# Write out line
 	print $outfh "$_\n";
 	# Apply FILE_LICENCE() immediately after include guard
-	if ( defined $maybe_guard ) {
+	if ( defined $maybe_guard && ! defined $guard ) {
 	  if ( /^\#define\s+_?_${maybe_guard}_?_$/ ) {
-	    die "Duplicate header guard detected in $infile\n" if $guard;
 	    $guard = $maybe_guard;
 	    print $outfh "\nFILE_LICENCE ( $licence );\n" if $licence;
 	  }