AArch64: Make LONG 4 bytes

The libSYS/include/machine_type.h header file states LONG should be
"Data type representing 4 byte signed integer on all supported
platforms" but only provided for defining LONG as INT and ULONG as
UINT when __x86_64__ was defined. This has been changed to when
__LP64__ is defined, so that it also applies to AArch64. The change
to libFDK/include/common_fix.h is then needed to get the project to
compile.

Change-Id: Iea42d7eca97dcc9da772a05b207d134cb999a72a
Signed-off-by: Marcus Oakland <marcus.oakland@arm.com>

libFDK/include/common_fix.h

@@ -226,7 +226,7 @@ FDK_INLINE FIXP_SGL fAbs(FIXP_SGL x)
                 { return fixabs_S(x); }
 
 /* workaround for TI C6x compiler but not for TI ARM9E compiler */
-#if (!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__)
+#if (!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__LP64__)
 FDK_INLINE INT  fAbs(INT x)
                 { return fixabs_I(x); }
 #endif
@@ -336,7 +336,7 @@ FDK_INLINE FIXP_SGL fMax(FIXP_SGL a, FIXP_SGL b)
                 { return fixmax_S(a,b); }
 
 /* workaround for TI C6x compiler but not for TI ARM9E */
-#if ((!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__x86_64__)) || (FIX_FRACT == 1)
+#if ((!defined(__TI_COMPILER_VERSION__) || defined(__TI_TMS470_V5__)) && !defined(__LP64__)) || (FIX_FRACT == 1)
 FDK_INLINE INT fMax(INT a, INT b)
                 { return fixmax_I(a,b); }
 FDK_INLINE INT fMin(INT a, INT b)

libSYS/include/machine_type.h

@@ -154,15 +154,15 @@ amm-info@iis.fraunhofer.de
 
   typedef signed int INT;
   typedef unsigned int UINT;
-#ifdef __x86_64__
+#ifdef __LP64__
   /* force FDK long-datatypes to 4 byte  */
   /* jdr: Use defines to avoid type alias problems on 64 bit machines. */
   #define LONG INT
   #define ULONG UINT
-#else /* __x86_64__ */
+#else /* __LP64__ */
   typedef signed long LONG;
   typedef unsigned long ULONG;
-#endif	/* __x86_64__ */
+#endif	/* __LP64__ */
   typedef signed short SHORT;
   typedef unsigned short USHORT;
   typedef signed char SCHAR;