syslog: Add header file inclusion to eliminate a warning; mm/iob: private function needs static storage class.

drivers/syslog/syslog_write.c

@@ -40,6 +40,8 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
+
+#include <nuttx/arch.h>
 #include <nuttx/sched.h>
 #include <nuttx/syslog/syslog.h>
 

mm/iob/iob_alloc_qentry.c

@@ -64,7 +64,7 @@
  *
  ****************************************************************************/
 
-FAR struct iob_qentry_s *iob_alloc_qcommitted(void)
+static FAR struct iob_qentry_s *iob_alloc_qcommitted(void)
 {
   FAR struct iob_qentry_s *iobq = NULL;
   irqstate_t flags;