intel_th: Enumerate Low Power Path output port type

Trace Hub 2.x adds Low Power Path (LPP) output port type, which provides
a low power mode trace path from sources to PTI or BSSB.

This adds an output subdevice for the LPP port.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

drivers/hwtracing/intel_th/core.c

@@ -500,6 +500,21 @@ static const struct intel_th_subdevice {
 		.otype	= GTH_PTI,
 		.scrpd	= SCRPD_PTI_IS_PRIM_DEST,
 	},
+	{
+		.nres	= 1,
+		.res	= {
+			{
+				.start	= REG_PTI_OFFSET,
+				.end	= REG_PTI_OFFSET + REG_PTI_LENGTH - 1,
+				.flags	= IORESOURCE_MEM,
+			},
+		},
+		.id	= -1,
+		.name	= "lpp",
+		.type	= INTEL_TH_OUTPUT,
+		.otype	= GTH_LPP,
+		.scrpd	= SCRPD_PTI_IS_PRIM_DEST,
+	},
 	{
 		.nres	= 1,
 		.res	= {

drivers/hwtracing/intel_th/intel_th.h

@@ -103,7 +103,8 @@ enum {
 	GTH_NONE = 0,
 	GTH_MSU,	/* memory/usb */
 	GTH_CTP,	/* Common Trace Port */
-	GTH_PTI = 4,	/* MIPI-PTI */
+	GTH_LPP,	/* Low Power Path */
+	GTH_PTI,	/* MIPI-PTI */
 };
 
 /**