mt8173: Improve performance by handling more interrupts during idle

1. Set more wakeup source
2. Update PCM code for control logic

Change-Id: I2ad06bd85bd1c75a22c838eab4cf5566c443b89a
Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>

plat/mediatek/mt8173/drivers/spm/spm.h

@@ -216,6 +216,7 @@
 #define WAKE_SRC_USB_PDN	(1 << 15)
 #define WAKE_SRC_AFE		(1 << 20)
 #define WAKE_SRC_THERM		(1 << 21)
+#define WAKE_SRC_CIRQ		(1 << 22)
 #define WAKE_SRC_SYSPWREQ	(1 << 24)
 #define WAKE_SRC_SEJ		(1 << 27)
 #define WAKE_SRC_ALL_MD32	(1 << 28)