sh: cache use jump_to_P2() and back_to_P1() from asm/system.h

Both jump_to_P2() and back_to_P1() functions are found in asm/system.h
header file and functionally they are the same, don't redefine them.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/sh/cpu/sh4/cache.c

@@ -7,44 +7,9 @@
 
 #include <common.h>
 #include <command.h>
-#include <asm/processor.h>
 #include <asm/io.h>
-
-/*
- * Jump to P2 area.
- * When handling TLB or caches, we need to do it from P2 area.
- */
-#define jump_to_P2()			\
-  do {					\
-    unsigned long __dummy;		\
-    __asm__ __volatile__(		\
-		"mov.l	1f, %0\n\t"	\
-		"or	%1, %0\n\t"	\
-		"jmp	@%0\n\t"	\
-		" nop\n\t"		\
-		".balign 4\n"		\
-		"1:	.long 2f\n"	\
-		"2:"			\
-		: "=&r" (__dummy)	\
-		: "r" (0x20000000));	\
-  } while (0)
-
-/*
- * Back to P1 area.
- */
-#define back_to_P1()					\
-  do {							\
-    unsigned long __dummy;				\
-    __asm__ __volatile__(				\
-		"nop;nop;nop;nop;nop;nop;nop\n\t"	\
-		"mov.l	1f, %0\n\t"			\
-		"jmp	@%0\n\t"			\
-		" nop\n\t"				\
-		".balign 4\n"				\
-		"1:	.long 2f\n"			\
-		"2:"					\
-		: "=&r" (__dummy));			\
-  } while (0)
+#include <asm/processor.h>
+#include <asm/system.h>
 
 #define CACHE_VALID       1
 #define CACHE_UPDATED     2