Merge pull request #2802 from solbjorn/fix-kernel-wundef

[contrib][linux] Fix -Wundef inside Linux kernel tree

lib/decompress/huf_decompress.c

@@ -47,11 +47,13 @@
  * Disable when MSAN is enabled.
  */
 #if defined(__linux__) || defined(__linux) || defined(__APPLE__)
-# if ZSTD_MEMORY_SANITIZER || ZSTD_DATAFLOW_SANITIZER
+# if ZSTD_MEMORY_SANITIZER
+#  define HUF_ASM_SUPPORTED 0
+# elif ZSTD_DATAFLOW_SANITIZER
 #  define HUF_ASM_SUPPORTED 0
 # else
 #  define HUF_ASM_SUPPORTED 1
-#endif
+# endif
 #else
 # define HUF_ASM_SUPPORTED 0
 #endif