Added used include of <sys/mutex.h>. The SMP case was broken by

incompletely converting simplelocks to mutexes (COM_LOCK() is supposed
to hide the SMP locking internals, but it now depends on mutex interfaces
being visible).

sys/dev/cy/cy.c

@@ -78,6 +78,7 @@
 #include <sys/ipl.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
+#include <sys/mutex.h>
 #include <sys/syslog.h>
 #include <machine/lock.h>
 #include <machine/psl.h>

sys/dev/cy/cy_isa.c

@@ -78,6 +78,7 @@
 #include <sys/ipl.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
+#include <sys/mutex.h>
 #include <sys/syslog.h>
 #include <machine/lock.h>
 #include <machine/psl.h>

sys/i386/isa/cy.c

@@ -78,6 +78,7 @@
 #include <sys/ipl.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
+#include <sys/mutex.h>
 #include <sys/syslog.h>
 #include <machine/lock.h>
 #include <machine/psl.h>