x86/build/vdso: Remove unused $(vobjs-nox32) in Makefile

Since commit bfad381c ("x86/vdso: Improve the fake section
headers"), $(vobjs-nox32) is empty.  Therefore, $(vobjs64-for-x32)
is the same as $(vobjs-y).
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1526352744-28229-2-git-send-email-yamada.masahiro@socionext.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/entry/vdso/Makefile

@@ -100,11 +100,8 @@ VDSO_LDFLAGS_vdsox32.lds = -Wl,-m,elf32_x86_64 \
 			   -Wl,-z,max-page-size=4096 \
 			   -Wl,-z,common-page-size=4096
 
-# 64-bit objects to re-brand as x32
-vobjs64-for-x32 := $(filter-out $(vobjs-nox32),$(vobjs-y))
-
 # x32-rebranded versions
-vobjx32s-y := $(vobjs64-for-x32:.o=-x32.o)
+vobjx32s-y := $(vobjs-y:.o=-x32.o)
 
 # same thing, but in the output directory
 vobjx32s := $(foreach F,$(vobjx32s-y),$(obj)/$F)