[PATCH] Fix boot_cpu_data on x86-64

From: Andreas Gruenbacher

Add brackets to boot_cpu_data to fix compilation of centrino cpufreq driver.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-x86_64/processor.h

@@ -84,7 +84,7 @@ extern struct tss_struct init_tss[NR_CPUS];
 extern struct cpuinfo_x86 cpu_data[];
 #define current_cpu_data cpu_data[smp_processor_id()]
 #else
-#define cpu_data &boot_cpu_data
+#define cpu_data (&boot_cpu_data)
 #define current_cpu_data boot_cpu_data
 #endif