Merge https://gitlab.denx.de/u-boot/custodians/u-boot-riscv

- Sipeed Maix support S-mode.
- Provide command sbi.
- Use fdtdec_get_addr_size_auto_parent to get fu540 cache base address.
- Fix a compiler error with CONFIG_SPL_SMP=n.
- Fix sifive ram driver 32 compiler warnings.
- Fix kendryte/pll.h redefine nop() warning.

drivers/ram/sifive/fu540_ddr.c

@@ -316,12 +316,12 @@ static int fu540_ddr_setup(struct udevice *dev)
 	priv->info.size = get_ram_size((long *)priv->info.base,
 				       ddr_size);
 
-	debug("%s : %lx\n", __func__, priv->info.size);
+	debug("%s : %lx\n", __func__, (uintptr_t)priv->info.size);
 
 	/* check memory access for all memory */
 	if (priv->info.size != ddr_size) {
 		printf("DDR invalid size : 0x%lx, expected 0x%lx\n",
-		       priv->info.size, (uintptr_t)ddr_size);
+		       (uintptr_t)priv->info.size, (uintptr_t)ddr_size);
 		return -EINVAL;
 	}