elgin-rv1108: Use rk_board_late_init() for GPIO settings

Since commit 8e9a8d0d0c8c ("rockchip: elgin-rv1108: use board_early_init_f
for per-boar init") the function that configure the board GPIOs is no
longer called since CONFIG_BOARD_EARLY_INIT_F=y is not selected.

These GPIOs do not need to be configured in such early stagem, so change it
to rk_board_late_init() and also select CONFIG_BOARD_LATE_INIT=y
to fix the regression.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/elgin-rv1108_defconfig b/configs/elgin-rv1108_defconfig
index 62af763..80d53f3 100644
--- a/configs/elgin-rv1108_defconfig
+++ b/configs/elgin-rv1108_defconfig
@@ -10,6 +10,7 @@
 CONFIG_DEBUG_UART=y
 # CONFIG_USE_BOOTCOMMAND is not set
 CONFIG_DEFAULT_FDT_FILE="rv1108-elgin-r1.dtb"
+CONFIG_BOARD_LATE_INIT=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_CMD_GPIO=y