cmd_time: merge run_command_and_time_it with cmd_process

As far as every arch has a get_timer function,
run_command_and_time_it code can now disappear.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-By: Che-Liang Chiou <clchiou@chromium.org>
[trini: s/ulong/unsigned long/ in command.h portion]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/common/hush.c b/common/hush.c
index eb6c879..cc81c9c 100644
--- a/common/hush.c
+++ b/common/hush.c
@@ -1665,7 +1665,7 @@
 		}
 		/* Process the command */
 		return cmd_process(flag, child->argc, child->argv,
-				   &flag_repeat);
+				   &flag_repeat, NULL);
 #endif
 	}
 #ifndef __U_BOOT__