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>
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 0673c47..a40342b 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -142,6 +142,7 @@
 
 	return pid;
 }
+EXPORT_SYMBOL(kernel_thread);
 
 /*
  * Free current thread data structures etc..
@@ -186,6 +187,7 @@
 
 	return fpvalid;
 }
+EXPORT_SYMBOL(dump_fpu);
 
 asmlinkage void ret_from_fork(void);