ALSA: line6: add support for POD HD Pro X

It uses the same protocol as other POD HD models so it just needed
proper config.

Signed-off-by: Baltazár Radics <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/usb/line6/podhd.c

···
 	LINE6_PODX3,
 	LINE6_PODX3LIVE,
 	LINE6_PODHD500X,
-	LINE6_PODHDDESKTOP
+	LINE6_PODHDDESKTOP,
+	LINE6_PODHDPROX,
 };
 
 struct usb_line6_podhd {
···
 	{ LINE6_IF_NUM(0x414B, 0), .driver_info = LINE6_PODX3LIVE },
 	{ LINE6_IF_NUM(0x4159, 0), .driver_info = LINE6_PODHD500X },
 	{ LINE6_IF_NUM(0x4156, 0), .driver_info = LINE6_PODHDDESKTOP },
+	{ LINE6_IF_NUM(0x415A, 0), .driver_info = LINE6_PODHDPROX },
 	{}
 };
 
···
 		.ep_ctrl_r = 0x81,
 		.ep_ctrl_w = 0x01,
 		.ctrl_if = 1,
+		.ep_audio_r = 0x86,
+		.ep_audio_w = 0x02,
+	},
+	[LINE6_PODHDPROX] = {
+		.id = "PODHDPROX",
+		.name = "POD HD Pro X",
+		.capabilities	= LINE6_CAP_CONTROL | LINE6_CAP_CONTROL_INFO
+				| LINE6_CAP_PCM | LINE6_CAP_HWMON | LINE6_CAP_IN_NEEDS_OUT,
+		.altsetting = 1,
+		.ctrl_if = 1,
+		.ep_ctrl_r = 0x81,
+		.ep_ctrl_w = 0x01,
 		.ep_audio_r = 0x86,
 		.ep_audio_w = 0x02,
 	},