rockchip: tpl: Remove board_early_init_f()

There is no need for board_early_init_f() in TPL, anything like this
should goes to SPL.
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/mach-rockchip/tpl.c

@@ -43,18 +43,11 @@ __weak void rockchip_stimer_init(void)
 	       TIMER_CONTROL_REG);
 }
 
-__weak int board_early_init_f(void)
-{
-	return 0;
-}
-
 void board_init_f(ulong dummy)
 {
 	struct udevice *dev;
 	int ret;
 
-	board_early_init_f();
-
 #if defined(CONFIG_DEBUG_UART) && defined(CONFIG_TPL_SERIAL_SUPPORT)
 	/*
 	 * Debug UART can be used from here if required: