riscv: acpi: avoid errors caused by probing DT devices when ACPI is used

Similar to the ARM64 commit 3505f30fb6a9s ("ARM64 / ACPI: If we chose
to boot from acpi then disable FDT"), let's not do DT hardware probing
if ACPI is enabled in early boot.  This avoids errors caused by
repeated driver probing.

Signed-off-by: Han Gao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: cleaned up patch description and subject]
Signed-off-by: Paul Walmsley <[email protected]>

Author: RevySR

arch/riscv/kernel/setup.c

@@ -331,11 +331,14 @@ void __init setup_arch(char **cmdline_p)
 	/* Parse the ACPI tables for possible boot-time configuration */
 	acpi_boot_table_init();
 
+	if (acpi_disabled) {
 #if IS_ENABLED(CONFIG_BUILTIN_DTB)
-	unflatten_and_copy_device_tree();
+		unflatten_and_copy_device_tree();
 #else
-	unflatten_device_tree();
+		unflatten_device_tree();
 #endif
+	}
+
 	misc_mem_init();
 
 	init_resources();