ALSA: doc: ReSTize img,spdif-in.txt

Yet another simple conversion from a plain text file.
Put to cards directory.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/alsa/img,spdif-in.txt → Documentation/sound/cards/img-spdif-in.rst

+================================================
+Imagination Technologies SPDIF Input Controllers
+================================================
+
 The Imagination Technologies SPDIF Input controller contains the following
 controls:
 
-name='IEC958 Capture Mask',index=0
+* name='IEC958 Capture Mask',index=0
 
 This control returns a mask that shows which of the IEC958 status bits
 can be read using the 'IEC958 Capture Default' control.
 
-name='IEC958 Capture Default',index=0
+* name='IEC958 Capture Default',index=0
 
 This control returns the status bits contained within the SPDIF stream that
 is being received. The 'IEC958 Capture Mask' shows which bits can be read
 from this control.
 
-name='SPDIF In Multi Frequency Acquire',index=0
-name='SPDIF In Multi Frequency Acquire',index=1
-name='SPDIF In Multi Frequency Acquire',index=2
-name='SPDIF In Multi Frequency Acquire',index=3
+* name='SPDIF In Multi Frequency Acquire',index=0
+* name='SPDIF In Multi Frequency Acquire',index=1
+* name='SPDIF In Multi Frequency Acquire',index=2
+* name='SPDIF In Multi Frequency Acquire',index=3
 
 This control is used to attempt acquisition of up to four different sample
 rates. The active rate can be obtained by reading the 'SPDIF In Lock Frequency'
@@ -29,21 +33,21 @@ four sample rates set here.
 If less than four rates are required, the same rate can be specified more than
 once
 
-name='SPDIF In Lock Frequency',index=0
+* name='SPDIF In Lock Frequency',index=0
 
 This control returns the active capture rate, or 0 if a lock has not been
 acquired
 
-name='SPDIF In Lock TRK',index=0
+* name='SPDIF In Lock TRK',index=0
 
 This control is used to modify the locking/jitter rejection characteristics
 of the block. Larger values increase the locking range, but reduce jitter
 rejection.
 
-name='SPDIF In Lock Acquire Threshold',index=0
+* name='SPDIF In Lock Acquire Threshold',index=0
 
 This control is used to change the threshold at which a lock is acquired.
 
-name='SPDIF In Lock Release Threshold',index=0
+* name='SPDIF In Lock Release Threshold',index=0
 
 This control is used to change the threshold at which a lock is released.

Documentation/sound/cards/index.rst

@@ -16,3 +16,4 @@ Card-Specific Information
    maya44
    hdspm
    serial-u16550
+   img-spdif-in