Drop support for Renesas H8/300 (h8300) architecture

H8/300 has been dead for several years, and the kernel for it
has not compiled for ages. Drop support for it.

Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

arch/h8300/lib/memcpy.S

@@ -1,84 +0,0 @@
-;;; memcpy.S
-
-#include <asm/linkage.h>
-
-#if defined(__H8300H__) 
-	.h8300h
-#endif
-#if defined(__H8300S__) 
-	.h8300s
-#endif
-
-	.text
-.global _memcpy
-
-;;; void *memcpy(void *to, void *from, size_t n)
-_memcpy:
-	mov.l	er2,er2
-	bne	1f
-	rts	
-1:	
-	;; address check
-	bld	#0,r0l
-	bxor	#0,r1l
-	bcs	4f
-	mov.l	er4,@-sp
-	mov.l	er0,@-sp
-	btst	#0,r0l
-	beq	1f
-	;; (aligned even) odd address
-	mov.b	@er1,r3l
-	mov.b	r3l,@er0
-	adds	#1,er1
-	adds	#1,er0
-	dec.l	#1,er2
-	beq	3f
-1:	
-	;; n < sizeof(unsigned long) check
-	sub.l	er4,er4
-	adds	#4,er4		; loop count check value
-	cmp.l	er4,er2
-	blo	2f
-	;; unsigned long copy
-1:	
-	mov.l	@er1,er3
-	mov.l	er3,@er0
-	adds	#4,er0
-	adds	#4,er1
-	subs	#4,er2
-	cmp.l	er4,er2
-	bcc	1b	
-	;; rest
-2:	
-	mov.l	er2,er2
-	beq	3f
-1:	
-	mov.b	@er1,r3l
-	mov.b	r3l,@er0
-	adds	#1,er1
-	adds	#1,er0
-	dec.l	#1,er2
-	bne	1b
-3:
-	mov.l	@sp+,er0
-	mov.l	@sp+,er4
-	rts
-
-	;; odd <- even / even <- odd
-4:	
-	mov.l	er4,er3
-	mov.l	er2,er4
-	mov.l	er5,er2
-	mov.l	er1,er5
-	mov.l	er6,er1
-	mov.l	er0,er6
-1:
-	eepmov.w
-	mov.w	r4,r4
-	bne	1b
-	dec.w	#1,e4
-	bpl	1b
-	mov.l	er1,er6
-	mov.l	er2,er5
-	mov.l	er3,er4
-	rts