binfmt_flat: Stub in a FLAT_PLAT_INIT().

This provides a FLAT_PLAT_INIT() arch hook for platforms that need to set
up specific register state prior to calling in to the process, as per
ELF_PLAT_INIT().

Signed-off-by: Takashi YOSHII <yoshii.takashi@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 56372ec..dfc0197 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -914,7 +914,9 @@
 	/* Stash our initial stack pointer into the mm structure */
 	current->mm->start_stack = (unsigned long )sp;
 
-	
+#ifdef FLAT_PLAT_INIT
+	FLAT_PLAT_INIT(regs);
+#endif
 	DBG_FLT("start_thread(regs=0x%x, entry=0x%x, start_stack=0x%x)\n",
 		(int)regs, (int)start_addr, (int)current->mm->start_stack);