ARM: imx8mm: verdin-imx8mm: fix board hang in spl

Move the preloader_console_init() call after spl_early_init() to avoid
board hang in SPL.

While at it remove explicit in-code console/debug UART pinmuxing (uart1
and its pinmuxing are already marked as u-boot,dm-spl via device tree).

Fixes: 4551e189 ("configs: verdin-imx8mm: verdin-imx8mp: enable dm serial")
Signed-off-by: NMarcel Ziswiler <marcel.ziswiler@toradex.com>

board/toradex/verdin-imx8mm/spl.c

@@ -74,19 +74,10 @@ int board_fit_config_name_match(const char *name)
 }
 #endif
 
-#define UART_PAD_CTRL	(PAD_CTL_PUE | PAD_CTL_PE | PAD_CTL_DSE4)
-
-/* Verdin UART_3, Console/Debug UART */
-static iomux_v3_cfg_t const uart_pads[] = {
-	IMX8MM_PAD_SAI2_RXFS_UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
-	IMX8MM_PAD_SAI2_RXC_UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
-};
 
 __weak void board_early_init(void)
 {
 	init_uart_clk(0);
-
-	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
 }
 
 int power_init_board(void)
@@ -132,8 +123,6 @@ void board_init_f(ulong dummy)
 
 	timer_init();
 
-	preloader_console_init();
-
 	/* Clear the BSS. */
 	memset(__bss_start, 0, __bss_end - __bss_start);
 
@@ -151,6 +140,8 @@ void board_init_f(ulong dummy)
 		hang();
 	}
 
+	preloader_console_init();
+
 	enable_tzc380();
 
 	power_init_board();