gettimeofday() and settimeofday(): Move gittimeofdady() from sched/clock to libc/time. All remove gettimeofday() from NuttX system calls. It is only a wrapper around clock_settime() and does not need a trap. gettimeofday() is no longer tried as a core OS interface.

gettimeofday has been decremented in POSIX 2008.  settimeofday() was never part of POSIX, but I decided to add it to libc as well just for symmetry.

syscall/syscall.csv

@@ -26,7 +26,6 @@
 "getenv","stdlib.h","!defined(CONFIG_DISABLE_ENVIRON)","FAR char*","FAR const char*"
 "getpid","unistd.h","","pid_t"
 "getsockopt","sys/socket.h","CONFIG_NSOCKET_DESCRIPTORS > 0 && defined(CONFIG_NET)","int","int","int","int","FAR void*","FAR socklen_t*"
-"gettimeofday","sys/time.h","","int","struct timeval*","FAR void*"
 "ioctl","sys/ioctl.h","!defined(CONFIG_LIBC_IOCTL_VARIADIC) && (CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0)","int","int","int","unsigned long"
 "kill","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","pid_t","int"
 "listen","sys/socket.h","CONFIG_NSOCKET_DESCRIPTORS > 0 && defined(CONFIG_NET)","int","int","int"

syscall/syscall_lookup.h

@@ -142,7 +142,6 @@ SYSCALL_LOOKUP(up_assert,                 2, STUB_up_assert)
   SYSCALL_LOOKUP(clock_getres,            2, STUB_clock_getres)
   SYSCALL_LOOKUP(clock_gettime,           2, STUB_clock_gettime)
   SYSCALL_LOOKUP(clock_settime,           2, STUB_clock_settime)
-  SYSCALL_LOOKUP(gettimeofday,            2, STUB_gettimeofday)
 
 /* The following are defined only if POSIX timers are supported */
 

syscall/syscall_stublookup.c

@@ -144,7 +144,6 @@ uintptr_t STUB_clock_systimer(int nbr);
 uintptr_t STUB_clock_getres(int nbr, uintptr_t parm1, uintptr_t parm2);
 uintptr_t STUB_clock_gettime(int nbr, uintptr_t parm1, uintptr_t parm2);
 uintptr_t STUB_clock_settime(int nbr, uintptr_t parm1, uintptr_t parm2);
-uintptr_t STUB_gettimeofday(int nbr, uintptr_t parm1, uintptr_t parm2);
 
 /* The following are defined only if POSIX timers are supported */