[PATCH v2] xen/efi: efibind: fix MISRA C 2012 Directive 4.10 violation

[Xenia Ragiadakou <burzalodowa@xxxxxxxxx>]

Prevent header file from being included more than once by adding ifndef guard.

In order to be close to gnu-efi code
- for x86_64, use the same guard
- for arm64, that there is no guard in gnu-efi, for consistency,
use a similar format and position to the x86_64 guard

Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
---

Changes in v2:
- import efibind.h guard from gnu-efi for x86_64
- add a guard for arm64 in a similar, to x86_64, way
- change commit message accordingly

 xen/arch/arm/include/asm/arm64/efibind.h  | 5 ++++-
 xen/arch/x86/include/asm/x86_64/efibind.h | 4 +++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/include/asm/arm64/efibind.h 
b/xen/arch/arm/include/asm/arm64/efibind.h
index 2b0bf40bf2..8b43bb8495 100644
--- a/xen/arch/arm/include/asm/arm64/efibind.h
+++ b/xen/arch/arm/include/asm/arm64/efibind.h
@@ -16,7 +16,8 @@ Abstract:
 Revision History
 
 --*/
-
+#ifndef AARCH64_EFI_BIND
+#define AARCH64_EFI_BIND
 #ifndef __GNUC__
 #pragma pack()
 #endif
@@ -205,6 +206,8 @@ typedef uint64_t   UINTN;
 
 #endif
 
+#endif
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/arch/x86/include/asm/x86_64/efibind.h 
b/xen/arch/x86/include/asm/x86_64/efibind.h
index ddcfae07ec..e23cd16cb6 100644
--- a/xen/arch/x86/include/asm/x86_64/efibind.h
+++ b/xen/arch/x86/include/asm/x86_64/efibind.h
@@ -16,7 +16,8 @@ Abstract:
 Revision History
 
 --*/
-
+#ifndef X86_64_EFI_BIND
+#define X86_64_EFI_BIND
 #ifndef __GNUC__
 #pragma pack()
 #endif
@@ -278,3 +279,4 @@ typedef uint64_t   UINTN;
 #pragma warning ( disable : 4731 )  // Suppress warnings about modification of 
EBP
 #endif
 
+#endif
-- 
2.34.1