Current "led" help and usage info has redundancy and extraneous
newlines, tweak it to be consistent with other commands.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
 
 U_BOOT_CMD(
        led, 3, 1, do_led,
-       "led\t- ["
+       "["
 #ifdef CONFIG_BOARD_SPECIFIC_LED
 #ifdef STATUS_LED_BIT
        "0|"
 #ifdef STATUS_LED_BLUE
        "blue|"
 #endif
-       "all] [on|off|toggle]\n",
-       "led [led_name] [on|off|toggle] sets or clears led(s)\n"
+       "all] [on|off|toggle]",
+       "[led_name] [on|off|toggle] sets or clears led(s)"
 );