ALSA: line6: add hw monitor volume control to POD HD500X

Add hw monitor volume control for POD HD500X. This is done adding
LINE6_CAP_HWMON_CTL to the capabilities

Signed-off-by: Hans P. Moller <[email protected]>
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: hmollercl

sound/usb/line6/podhd.c

@@ -507,7 +507,7 @@ static const struct line6_properties podhd_properties_table[] = {
 	[LINE6_PODHD500X] = {
 		.id = "PODHD500X",
 		.name = "POD HD500X",
-		.capabilities	= LINE6_CAP_CONTROL
+		.capabilities	= LINE6_CAP_CONTROL | LINE6_CAP_HWMON_CTL
 				| LINE6_CAP_PCM | LINE6_CAP_HWMON,
 		.altsetting = 1,
 		.ep_ctrl_r = 0x81,