sh: Kill off ARCH_SUPPORTS_AOUT and remnants of a.out support.

SH never really supported a.out, so this was all just copied over blindly
from x86 way back when. As we don't reference linux/a.out.h anywhere in
the tree, these can now safely be killed off.

Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/Kconfig

···
 config ARCH_NO_VIRT_TO_BUS
 	def_bool y
 
-config ARCH_SUPPORTS_AOUT
-	def_bool y
-
 config IO_TRAPPED
 	bool
 

arch/sh/include/asm/a.out.h

···
-#ifndef __ASM_SH_A_OUT_H
-#define __ASM_SH_A_OUT_H
-
-struct exec
-{
-  unsigned long a_info;		/* Use macros N_MAGIC, etc for access */
-  unsigned a_text;		/* length of text, in bytes */
-  unsigned a_data;		/* length of data, in bytes */
-  unsigned a_bss;		/* length of uninitialized data area for file, in bytes */
-  unsigned a_syms;		/* length of symbol table data in file, in bytes */
-  unsigned a_entry;		/* start address */
-  unsigned a_trsize;		/* length of relocation info for text, in bytes */
-  unsigned a_drsize;		/* length of relocation info for data, in bytes */
-};
-
-#define N_TRSIZE(a)	((a).a_trsize)
-#define N_DRSIZE(a)	((a).a_drsize)
-#define N_SYMSIZE(a)	((a).a_syms)
-
-#endif /* __ASM_SH_A_OUT_H */