Wrap <linux/compiler.h> inside '#ifndef __ASSEMBLY__'

None of the compatibility defines make sense for assembly
files, and gcc has trouble with vararg macros when using
"-traditional" (which is used for asm), to the point of
ICE'ing.

include/linux/compiler.h

 #ifndef __LINUX_COMPILER_H
 #define __LINUX_COMPILER_H
 
+#ifndef __ASSEMBLY__
+
 #ifdef __CHECKER__
 # define __user		__attribute__((noderef, address_space(1)))
 # define __kernel	/* default address space */
@@ -22,7 +24,6 @@ extern void __chk_io_ptr(void __iomem *);
 
 #ifdef __KERNEL__
 
-#ifndef __ASSEMBLY__
 #if __GNUC__ > 3
 # include <linux/compiler-gcc+.h>	/* catch-all for GCC 4, 5, etc. */
 #elif __GNUC__ == 3
@@ -32,7 +33,6 @@ extern void __chk_io_ptr(void __iomem *);
 #else
 # error Sorry, your compiler is too old/not recognized.
 #endif
-#endif
 
 /* Intel compiler defines __GNUC__. So we will overwrite implementations
  * coming from above header files here
@@ -62,6 +62,8 @@ extern void __chk_io_ptr(void __iomem *);
     (typeof(ptr)) (__ptr + (off)); })
 #endif
 
+#endif /* __ASSEMBLY__ */
+
 #endif /* __KERNEL__ */
 
 /*