avr32: use generic gd->start_addr_sp

Before avr32 had an extra storage for stack end to have a nice stack printout
on exception. Remove this extra storage and use generic gd->start_addr_sp
instead.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

arch/avr32/cpu/exception.c

@@ -96,11 +96,11 @@ void do_unknown_exception(unsigned int ecr, struct pt_regs *regs)
 	printf("CPU Mode: %s\n", cpu_modes[mode]);
 
 	/* Avoid exception loops */
-	if (regs->sp < (gd->arch.stack_end - CONFIG_STACKSIZE)
-			|| regs->sp >= gd->arch.stack_end)
+	if (regs->sp < (gd->start_addr_sp - CONFIG_STACKSIZE) ||
+	    regs->sp >= gd->start_addr_sp)
 		printf("\nStack pointer seems bogus, won't do stack dump\n");
 	else
-		dump_mem("\nStack: ", regs->sp, gd->arch.stack_end);
+		dump_mem("\nStack: ", regs->sp, gd->start_addr_sp);
 
 	panic("Unhandled exception\n");
 }

arch/avr32/include/asm/global_data.h

@@ -8,7 +8,6 @@
 
 /* Architecture-specific global data */
 struct arch_global_data {
-	unsigned long stack_end;	/* highest stack address */
 	unsigned long cpu_hz;		/* cpu core clock frequency */
 };
 

arch/avr32/lib/board.c

@@ -157,7 +157,7 @@ void board_init_f(ulong board_type)
 
 	/* And finally, a new, bigger stack. */
 	new_sp = (unsigned long *)addr;
-	gd->arch.stack_end = addr;
+	gd->start_addr_sp = addr;
 	*(--new_sp) = 0;
 	*(--new_sp) = 0;