avr32: Move stack_end to arch_global_data

Move this field into arch_global_data and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/avr32/include/asm/global_data.h b/arch/avr32/include/asm/global_data.h
index 236a9da..3be8628 100644
--- a/arch/avr32/include/asm/global_data.h
+++ b/arch/avr32/include/asm/global_data.h
@@ -24,6 +24,7 @@
 
 /* Architecture-specific global data */
 struct arch_global_data {
+	unsigned long stack_end;	/* highest stack address */
 };
 
 /*
@@ -38,7 +39,6 @@
 	bd_t		*bd;
 	unsigned long	flags;
 	unsigned int	baudrate;
-	unsigned long	stack_end;	/* highest stack address */
 	unsigned long	have_console;	/* serial_init() was called */
 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */