ALSA: Reduce stall detection timeout in riptide.c

Reduce the command timeout to 0.5sec. Should be enough to allow a
working command interface but removes a RCU stall and slow resume on
some revisions where the AC97 revision detection stalls in resume.
Signed-off-by: Peter Gruber <nokos@gmx.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/riptide/riptide.c

@@ -172,7 +172,7 @@ MODULE_PARM_DESC(opl3_port, "OPL3 port # for Riptide driver.");
 
 #define MAX_WRITE_RETRY  10	/* cmd interface limits */
 #define MAX_ERROR_COUNT  10
-#define CMDIF_TIMEOUT    500000
+#define CMDIF_TIMEOUT    50000
 #define RESET_TRIES      5
 
 #define READ_PORT_ULONG(p)     inl((unsigned long)&(p))