[ALSA] sound: ice1712: unused structs

Don't need to declare a struct when defining a structure layout.  Both
of these structs are unused.
sound/pci/ice1712/revo.c:39:3: warning: symbol 'revo51' was not declared. Should it be static?
sound/pci/ice1712/phase.c:54:3: warning: symbol 'phase28' was not declared. Should it be static?
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/phase.c

@@ -51,7 +51,7 @@
 struct phase28_spec {
 	unsigned short master[2];
 	unsigned short vol[8];
-} phase28;
+};
 
 /* WM8770 registers */
 #define WM_DAC_ATTEN		0x00	/* DAC1-8 analog attenuation */

sound/pci/ice1712/revo.c

@@ -36,7 +36,7 @@
 struct revo51_spec {
 	struct snd_i2c_device *dev;
 	struct snd_pt2258 *pt2258;
-} revo51;
+};
 
 static void revo_i2s_mclk_changed(struct snd_ice1712 *ice)
 {