arm64: Only disable LTO for vDSO when Clang is used

GCC LTO works fine on the vDSO.

Signed-off-by: Sultan Alsawaf <[email protected]>

arch/arm64/kernel/vdso/Makefile

@@ -19,13 +19,13 @@ ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1  --hash-style=sysv \
 		--build-id -n -T
 ccflags-y := -fno-stack-protector
 ccflags-y += -DDISABLE_BRANCH_PROFILING -ffixed-x18
-ccflags-y += $(DISABLE_LTO)
 ccflags-y += $(call cc-option, -fno-whole-program)
 
 # Force -O2 to avoid libgcc dependencies
 CFLAGS_REMOVE_vgettimeofday.o = -pg -Os
 CFLAGS_vgettimeofday.o = -O2 -fPIC
 ifneq ($(cc-name),clang)
+ccflags-y += $(DISABLE_LTO)
 CFLAGS_vgettimeofday.o += -mcmodel=tiny
 endif