common: board_r: enable initr_serial() anyway

If we don't enable initr_serial(), even after relocation done, the
serial driver always use no relocation address of ns16550_serial_ops
which is setup in serial_init(). This makes abort issue when arm64 kernel
is load to overlap the ram area.

fixes: 064eb49314
(serial: ns16550: support using pre-loader serial)

Change-Id: Iab67010ba3712754c036ecb2aee76c13a0b200b6
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

common/board_r.c

@@ -172,22 +172,7 @@ static int initr_reloc_global_data(void)
 
 static int initr_serial(void)
 {
-/*
- * 1. Serial has been initialized in board_f.c => serial_init(), there is
- *    no special reason to init it again;
- *
- * 2. Pre-serial works depending on aliases to get pre-serial phandle when
- *    parse dtb. If CONFIG_USING_KERNEL_DTB is enabled, there are both kernel
- *    dtb and U-Boot dtb aliases added into aliases_lookup, these nodes have
- *    same names but different phanles(U-Boot nodes has high prior), this may
- *    lead a wrong aliases node finding if try to get a node after kenrel dtb
- *    unflattened, i.e. using U-Boot phandle to get kernel dtb node!!
- *
- *    Notice: of_alias_dump() is provided to dump all aliases node.
- */
-#ifndef CONFIG_USING_KERNEL_DTB
 	serial_initialize();
-#endif
 	return 0;
 }