rockchip: rk3188: remove pinctrl init in spl_board_init

The pinctrl will default init the io while driver is probe
with new pinctrl driver.
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/mach-rockchip/rk3188-board-spl.c

@@ -23,7 +23,6 @@
 #include <asm/arch-rockchip/pmu_rk3188.h>
 #include <asm/arch-rockchip/sdram.h>
 #include <asm/arch-rockchip/timer.h>
-#include <dm/pinctrl.h>
 #include <dm/root.h>
 #include <dm/test.h>
 #include <dm/util.h>

arch/arm/mach-rockchip/rk3188-board.c

@@ -15,7 +15,6 @@
 #include <asm/arch-rockchip/periph.h>
 #include <asm/arch-rockchip/pmu_rk3288.h>
 #include <asm/arch-rockchip/boot_mode.h>
-#include <dm/pinctrl.h>
 
 __weak int rk_board_late_init(void)
 {
@@ -42,37 +41,7 @@ int board_late_init(void)
 
 int board_init(void)
 {
-#if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
-	struct udevice *pinctrl;
-	int ret;
-
-	/*
-	 * We need to implement sdcard iomux here for the further
-	 * initialization, otherwise, it'll hit sdcard command sending
-	 * timeout exception.
-	 */
-	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
-	if (ret) {
-		debug("%s: Cannot find pinctrl device\n", __func__);
-		goto err;
-	}
-	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD);
-	if (ret) {
-		debug("%s: Failed to set up SD card\n", __func__);
-		goto err;
-	}
-
 	return 0;
-err:
-	printf("board_init: Error %d\n", ret);
-
-	/* No way to report error here */
-	hang();
-
-	return -1;
-#else
-	return 0;
-#endif
 }
 
 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)