[clang][SVE] Use __inline__ instead of inline in arm_sve.h

The inline keyword is not defined in the C89 standard, so source files
that include arm_sve.h will fail compilation if -std=c89 is specified.
For consistency with arm_neon.h, we should use __inline__ instead.

Reviewed By: paulwalker-arm

Differential Revision: https://reviews.llvm.org/D96852

clang/utils/TableGen/SveEmitter.cpp

@@ -1201,7 +1201,7 @@ void SVEEmitter::createHeader(raw_ostream &OS) {
   OS << "};\n\n";
 
   OS << "/* Function attributes */\n";
-  OS << "#define __aio static inline __attribute__((__always_inline__, "
+  OS << "#define __aio static __inline__ __attribute__((__always_inline__, "
         "__nodebug__, __overloadable__))\n\n";
 
   // Add reinterpret functions.