CRIS: use kbuild.h instead of defining macros in asm-offset.c

This is modelled on commits such as the one below:

Commit fc1c3a00 ("sh: use kbuild.h
instead of defining macros in asm-offsets.c") introduced in v2.6.26.
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NJesper Nilsson <jesper.nilsson@axis.com>

arch/cris/kernel/asm-offsets.c

+#include <linux/kbuild.h>
 #include <linux/sched.h>
 #include <asm/thread_info.h>
 
@@ -7,11 +8,6 @@
  * and format the required data.
  */
 
-#define DEFINE(sym, val) \
-	asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
 #if !defined(CONFIG_ETRAX_ARCH_V10) && !defined(CONFIG_ETRAX_ARCH_V32)
 #error One of ARCH v10 and ARCH v32 must be true!
 #endif