sh: Clean up more superfluous symbol exports.

Many of these symbols went away completely, or we just never cared about
them in the first place. Trim the exports down to the essential set.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/process_64.c

@@ -335,6 +335,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
 		      &regs, 0, NULL, NULL);
 }
+EXPORT_SYMBOL(kernel_thread);
 
 /*
  * Free current thread data structures etc..
@@ -417,6 +418,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
 	return 0; /* Task didn't use the fpu at all. */
 #endif
 }
+EXPORT_SYMBOL(dump_fpu);
 
 asmlinkage void ret_from_fork(void);