x86/vdso: Remove unused VDSO_HAS_32BIT_FALLBACK

VDSO_HAS_32BIT_FALLBACK has been removed from the core since
the architectures that support the generic vDSO library have
been converted to support the 32 bit fallbacks.

Remove unused VDSO_HAS_32BIT_FALLBACK from x86 vdso.
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20190830135902.20861-9-vincenzo.frascino@arm.com

arch/x86/include/asm/vdso/gettimeofday.h

@@ -96,8 +96,6 @@ long clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
 
 #else
 
-#define VDSO_HAS_32BIT_FALLBACK	1
-
 static __always_inline
 long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
 {