Unify use of bool config variables

e.g.
-#if CONFIG_LOGICAL_CPUS == 1
+#if CONFIG_LOGICAL_CPUS

This will make it easier to switch over to use the config_enabled()
macro later on.

Change-Id: I0bcf223669318a7b1105534087c7675a74c1dd8a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1874
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/include/cpu/x86/lapic.h

@@ -52,7 +52,7 @@ static inline __attribute__((always_inline)) unsigned long lapicid(void)
 }
 
 #ifndef __ROMCC__
-#if CONFIG_AP_IN_SIPI_WAIT != 1
+#if !CONFIG_AP_IN_SIPI_WAIT
 /* If we need to go back to sipi wait, we use the long non-inlined version of
  * this function in lapic_cpu_init.c
  */