cpu/hotplug: Fix a typo in comment "broadacasted"->"broadcasted"

Signed-off-by: Ethon Paul <ethp@qq.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200417164008.6541-1-ethp@qq.com

kernel/cpu.c

@@ -432,7 +432,7 @@ static inline bool cpu_smt_allowed(unsigned int cpu)
 	/*
 	 * On x86 it's required to boot all logical CPUs at least once so
 	 * that the init code can get a chance to set CR4.MCE on each
-	 * CPU. Otherwise, a broadacasted MCE observing CR4.MCE=0b on any
+	 * CPU. Otherwise, a broadcasted MCE observing CR4.MCE=0b on any
 	 * core will shutdown the machine.
 	 */
 	return !cpumask_test_cpu(cpu, &cpus_booted_once_mask);