KASAN: Do not sanitize kexec purgatory

[   24.121074] kexec: Undefined symbol: __asan_load8_noabort
[   24.121999] kexec-bzImage64: Loading purgatory failed

---
 arch/x86/purgatory/Makefile |    1 +
 1 file changed, 1 insertion(+)

@@ -8,6 +8,7 @@ PURGATORY_OBJS = $(addprefix $(obj)/,$(p
 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
 targets += purgatory.ro
 
+KASAN_SANITIZE	:= n
 KCOV_INSTRUMENT := n
 
 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That

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