usb: audio-v2: Correct comments for struct uac_clock_selector_descriptor

This is likely a copy-paste error. Replace "Source" with "Selector" where
appropriate.

Fixes: 7e847894 ("linux/usb/audio.h: split header")
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Link: https://lore.kernel.org/r/20240125211635.30140-1-alexander@tsoy.meSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/usb/audio-v2.h

@@ -82,7 +82,7 @@ struct uac_clock_source_descriptor {
 #define UAC_CLOCK_SOURCE_TYPE_INT_PROG	0x3
 #define UAC_CLOCK_SOURCE_SYNCED_TO_SOF	(1 << 2)
 
-/* 4.7.2.2 Clock Source Descriptor */
+/* 4.7.2.2 Clock Selector Descriptor */
 
 struct uac_clock_selector_descriptor {
 	__u8 bLength;
@@ -91,7 +91,7 @@ struct uac_clock_selector_descriptor {
 	__u8 bClockID;
 	__u8 bNrInPins;
 	__u8 baCSourceID[];
-	/* bmControls and iClockSource omitted */
+	/* bmControls and iClockSelector omitted */
 } __attribute__((packed));
 
 /* 4.7.2.3 Clock Multiplier Descriptor */