sh: boot: Remove sh5 cache handling

Commit 37744feebc086908 ("sh: remove sh5 support") in v5.8 forgot to
remove the sh5 cache handling.

Suggested-by: Yoshinori Sato <[e-mail]>
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: John Paul Adrian Glaubitz <[e-mail]>
Link: https://lore.kernel.org/r/23e9b[e-mail]
Signed-off-by: John Paul Adrian Glaubitz <[e-mail]>

arch/sh/boot/compressed/Makefile

···
 # create a compressed vmlinux image from the original vmlinux
 #
 
-OBJECTS := head_32.o misc.o cache.o piggy.o \
+OBJECTS := head_32.o misc.o piggy.o \
            ashiftrt.o ashldi3.o ashrsi3.o ashlsi3.o lshrsi3.o
 
 targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \

arch/sh/boot/compressed/cache.c

···
-// SPDX-License-Identifier: GPL-2.0
-int cache_control(unsigned int command)
-{
-	volatile unsigned int *p = (volatile unsigned int *) 0x80000000;
-	int i;
-
-	for (i = 0; i < (32 * 1024); i += 32) {
-		(void)*p;
-		p += (32 / sizeof(int));
-	}
-
-	return 0;
-}

arch/sh/boot/compressed/misc.c

···
 #undef memcpy
 #define memzero(s, n)     memset ((s), 0, (n))
 
-/* cache.c */
-#define CACHE_ENABLE      0
-#define CACHE_DISABLE     1
-int cache_control(unsigned int command);
-
 extern char input_data[];
 extern int input_len;
 static unsigned char *output;
···
 	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
 
 	puts("Uncompressing Linux... ");
-	cache_control(CACHE_ENABLE);
 	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
-	cache_control(CACHE_DISABLE);
 	puts("Ok, booting the kernel.\n");
 }