init/main: properly align the multi-line comment

Add a tab before it to follow standard practices. Also add the missing
full stop '.'.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

init/main.c

@@ -504,9 +504,9 @@ asmlinkage __visible void __init start_kernel(void)
 	local_irq_disable();
 	early_boot_irqs_disabled = true;
 
-/*
+	/*
 	 * Interrupts are still disabled. Do necessary setups, then
- * enable them
+	 * enable them.
 	 */
 	boot_cpu_init();
 	page_address_init();