mt8173: fix spm driver build errors

To fix build errors in following build conditions,
DEBUG=1 LOG_LEVEL<40
DEBUG=0 LOG_LEVEL>=40

Change-Id: Ib34aed07b2ae0abd8a3a46948adc9fbeaae715aa
Signed-off-by: yt.lee <yt.lee@mediatek.com>

plat/mediatek/mt8173/drivers/spm/spm.c

@@ -49,10 +49,6 @@
 
 #define SPM_SYSCLK_SETTLE       128	/* 3.9ms */
 
-#if DEBUG
-static int spm_dormant_sta = CPU_DORMANT_RESET;
-#endif
-
 DEFINE_BAKERY_LOCK(spm_lock);
 
 static int spm_hotplug_ready __section("tzfw_coherent_mem");
@@ -378,7 +374,6 @@ enum wake_reason_t spm_output_wake_reason(struct wake_status *wakesta)
 	     wakesta->raw_sta, wakesta->idle_sta, wakesta->event_reg,
 	     wakesta->isr);
 
-	INFO("dormant state = %d\n", spm_dormant_sta);
 	return wr;
 }