Disable MIPS VDSO until the cache issues have been sorted out.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -28,9 +28,9 @@ aflags-vdso := $(ccflags-vdso) \
 ifndef CONFIG_CPU_MIPSR6
   ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
     $(warning MIPS VDSO requires binutils >= 2.25)
-    obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
-    ccflags-vdso += -DDISABLE_MIPS_VDSO
   endif
+  obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
+  ccflags-vdso += -DDISABLE_MIPS_VDSO
 endif
 
 # VDSO linker flags.