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/command.c b/common/command.c
index 50c8429..305a236 100644
--- a/common/command.c
+++ b/common/command.c
@@ -513,7 +513,7 @@
 }
 
 enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
-			       int *repeatable)
+			       int *repeatable, ulong *ticks)
 {
 	enum command_ret_t rc = CMD_RET_SUCCESS;
 	cmd_tbl_t *cmdtp;
@@ -543,7 +543,11 @@
 
 	/* If OK so far, then do the command */
 	if (!rc) {
+		if (ticks)
+			*ticks = get_timer(0);
 		rc = cmd_call(cmdtp, flag, argc, argv);
+		if (ticks)
+			*ticks = get_timer(*ticks);
 		*repeatable &= cmdtp->repeatable;
 	}
 	if (rc == CMD_RET_USAGE)