ALSA: drivers: Constify snd_rawmidi_ops

Now snd_rawmidi_ops is maintained as a const pointer in snd_rawmidi,
we can constify the definitions.
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/mpu401/mpu401_uart.c

@@ -481,14 +481,14 @@ snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
 
  */
 
-static struct snd_rawmidi_ops snd_mpu401_uart_output =
+static const struct snd_rawmidi_ops snd_mpu401_uart_output =
 {
 	.open =		snd_mpu401_uart_output_open,
 	.close =	snd_mpu401_uart_output_close,
 	.trigger =	snd_mpu401_uart_output_trigger,
 };
 
-static struct snd_rawmidi_ops snd_mpu401_uart_input =
+static const struct snd_rawmidi_ops snd_mpu401_uart_input =
 {
 	.open =		snd_mpu401_uart_input_open,
 	.close =	snd_mpu401_uart_input_close,

sound/drivers/mtpav.c

@@ -600,13 +600,13 @@ static int snd_mtpav_get_ISA(struct mtpav *mcard)
 /*
  */
 
-static struct snd_rawmidi_ops snd_mtpav_output = {
+static const struct snd_rawmidi_ops snd_mtpav_output = {
 	.open =		snd_mtpav_output_open,
 	.close =	snd_mtpav_output_close,
 	.trigger =	snd_mtpav_output_trigger,
 };
 
-static struct snd_rawmidi_ops snd_mtpav_input = {
+static const struct snd_rawmidi_ops snd_mtpav_input = {
 	.open =		snd_mtpav_input_open,
 	.close =	snd_mtpav_input_close,
 	.trigger =	snd_mtpav_input_trigger,

sound/drivers/mts64.c

@@ -749,13 +749,13 @@ static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substr
 	spin_unlock_irqrestore(&mts->lock, flags);
 }
 
-static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
+static const struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
 	.open    = snd_mts64_rawmidi_open,
 	.close   = snd_mts64_rawmidi_close,
 	.trigger = snd_mts64_rawmidi_output_trigger
 };
 
-static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
+static const struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
 	.open    = snd_mts64_rawmidi_open,
 	.close   = snd_mts64_rawmidi_close,
 	.trigger = snd_mts64_rawmidi_input_trigger

sound/drivers/portman2x4.c

@@ -546,13 +546,13 @@ static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substr
 	spin_unlock_irqrestore(&pm->reg_lock, flags);
 }
 
-static struct snd_rawmidi_ops snd_portman_midi_output = {
+static const struct snd_rawmidi_ops snd_portman_midi_output = {
 	.open =		snd_portman_midi_open,
 	.close =	snd_portman_midi_close,
 	.trigger =	snd_portman_midi_output_trigger,
 };
 
-static struct snd_rawmidi_ops snd_portman_midi_input = {
+static const struct snd_rawmidi_ops snd_portman_midi_input = {
 	.open =		snd_portman_midi_open,
 	.close =	snd_portman_midi_close,
 	.trigger =	snd_portman_midi_input_trigger,

sound/drivers/serial-u16550.c

@@ -752,14 +752,14 @@ static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream
 		snd_uart16550_output_write(substream);
 }
 
-static struct snd_rawmidi_ops snd_uart16550_output =
+static const struct snd_rawmidi_ops snd_uart16550_output =
 {
 	.open =		snd_uart16550_output_open,
 	.close =	snd_uart16550_output_close,
 	.trigger =	snd_uart16550_output_trigger,
 };
 
-static struct snd_rawmidi_ops snd_uart16550_input =
+static const struct snd_rawmidi_ops snd_uart16550_input =
 {
 	.open =		snd_uart16550_input_open,
 	.close =	snd_uart16550_input_close,