MIPS: Remove unused PIC macros

asm/asm.h contains CPRESTORE, CPADD & CPLOAD macros that are intended
for use with position independent code, but are not used anywhere in the
kernel - along with a comment to that effect. Remove the dead code.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20903/
Cc: linux-mips@linux-mips.org

arch/mips/include/asm/asm.h

@@ -29,23 +29,6 @@
 #define CAT(str1, str2) __CAT(str1, str2)
 #endif
 
-/*
- * PIC specific declarations
- * Not used for the kernel but here seems to be the right place.
- */
-#ifdef __PIC__
-#define CPRESTORE(register)				\
-		.cprestore register
-#define CPADD(register)					\
-		.cpadd	register
-#define CPLOAD(register)				\
-		.cpload register
-#else
-#define CPRESTORE(register)
-#define CPADD(register)
-#define CPLOAD(register)
-#endif
-
 /*
  * LEAF - declare leaf routine
  */