libffi: fix multilib header conflict

libffi: fix multilib header conflict

fix error:
file /usr/include/ffitarget.h conflicts between attempted installs of lib32-libffi-dev-3.3-r0.armv7vet2hf_vfp and libffi-dev-3.3-r0.cortexa57

part of diff

#ifndef LIBFFI_ASM
-typedef unsigned long          ffi_arg;
-typedef signed long            ffi_sarg;
-
-typedef enum ffi_abi {
-  FFI_FIRST_ABI = 0,
-  FFI_SYSV,
-  FFI_VFP,
-  FFI_LAST_ABI,
-#if defined(__ARM_PCS_VFP) || defined(_M_ARM)
-  FFI_DEFAULT_ABI = FFI_VFP,
+#ifdef __ILP32__
+#define FFI_SIZEOF_ARG 8
+#define FFI_SIZEOF_JAVA_RAW  4
+typedef unsigned long long ffi_arg;
+typedef signed long long ffi_sarg;
+#elif defined(_M_ARM64)
+#define FFI_SIZEOF_ARG 8
+typedef unsigned long long ffi_arg;
+typedef signed long long ffi_sarg;
 #else
-  FFI_DEFAULT_ABI = FFI_SYSV,
-#endif
-} ffi_abi;
+typedef unsigned long ffi_arg;
+typedef signed long ffi_sarg;
 #endif

-#define FFI_EXTRA_CIF_FIELDS			\
-  int vfp_used;					\
-  unsigned short vfp_reg_free, vfp_nargs;	\
-  signed char vfp_args[16]			\
-
-#define FFI_TARGET_SPECIFIC_VARIADIC
-#ifndef _M_ARM
-#define FFI_TARGET_HAS_COMPLEX_TYPE
+typedef enum ffi_abi
+  {
+    FFI_FIRST_ABI = 0,
+    FFI_SYSV,
+    FFI_LAST_ABI,
+    FFI_DEFAULT_ABI = FFI_SYSV
+  } ffi_abi;
 #endif

 /* ---- Definitions for closures ----------------------------------------- */

 #define FFI_CLOSURES 1
-#define FFI_GO_CLOSURES 1
 #define FFI_NATIVE_RAW_API 0

 #if defined (FFI_EXEC_TRAMPOLINE_TABLE) && FFI_EXEC_TRAMPOLINE_TABLE

 #ifdef __MACH__
-#define FFI_TRAMPOLINE_SIZE 12
-#define FFI_TRAMPOLINE_CLOSURE_OFFSET 8
+#define FFI_TRAMPOLINE_SIZE 16
+#define FFI_TRAMPOLINE_CLOSURE_OFFSET 16
 #else
 #error "No trampoline table implementation"
 #endif

 #else
-#ifdef _MSC_VER
-#define FFI_TRAMPOLINE_SIZE 16
-#define FFI_TRAMPOLINE_CLOSURE_FUNCTION 12
-#else
-#define FFI_TRAMPOLINE_SIZE 12
-#endif
+#define FFI_TRAMPOLINE_SIZE 24
 #define FFI_TRAMPOLINE_CLOSURE_OFFSET FFI_TRAMPOLINE_SIZE
 #endif

+#ifdef _M_ARM64
+#define FFI_EXTRA_CIF_FIELDS unsigned is_variadic
+#endif
+

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>