avr32: remove cpu_data macro to fix compiles

Having cpu_data as a parameterless macro can easily cause build failures
because it can be a variable name like in linux/pm_domain.h [1]. So,
remove the macro and convert its only user. Because this architecture
cannot do SMP, remove the whole SMP block, too. Only compile tested due
to no hardware.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>

[1] https://lists.01.org/pipermail/kbuild-all/2014-February/003252.html
diff --git a/arch/avr32/include/asm/bugs.h b/arch/avr32/include/asm/bugs.h
index 7635e77..278661b 100644
--- a/arch/avr32/include/asm/bugs.h
+++ b/arch/avr32/include/asm/bugs.h
@@ -9,7 +9,7 @@
 
 static void __init check_bugs(void)
 {
-	cpu_data->loops_per_jiffy = loops_per_jiffy;
+	boot_cpu_data.loops_per_jiffy = loops_per_jiffy;
 }
 
 #endif /* __ASM_AVR32_BUGS_H */