x86: Change write_acpi_tables() signature a little bit

Change the parameter and return value of write_acpi_tables() to u32
to conform with other table write routines.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/qemu/fw_cfg.c

@@ -232,8 +232,7 @@ static struct fw_file *qemu_fwcfg_find_file(const char *name)
  *          be ignored.
  * @return: 0 on success, or negative value on failure
  */
-static int bios_linker_allocate(struct bios_linker_entry *entry,
-			   unsigned long *addr)
+static int bios_linker_allocate(struct bios_linker_entry *entry, u32 *addr)
 {
 	uint32_t size, align;
 	struct fw_file *file;
@@ -383,7 +382,7 @@ unsigned install_e820_map(unsigned max_entries, struct e820entry *entries)
 }
 
 /* This function loads and patches ACPI tables provided by QEMU */
-unsigned long write_acpi_tables(unsigned long addr)
+u32 write_acpi_tables(u32 addr)
 {
 	int i, ret = 0;
 	struct fw_file *file;

arch/x86/include/asm/acpi_table.h

@@ -390,4 +390,4 @@ void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
 			 void *dsdt);
 int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, u8 cpu,
 			 u16 flags, u8 lint);
-unsigned long write_acpi_tables(unsigned long start);
+u32 write_acpi_tables(u32 start);

arch/x86/lib/acpi_table.c

@@ -335,9 +335,9 @@ static void acpi_create_ssdt_generator(acpi_header_t *ssdt,
  * QEMU's version of write_acpi_tables is defined in
  * arch/x86/cpu/qemu/fw_cfg.c
  */
-unsigned long write_acpi_tables(unsigned long start)
+u32 write_acpi_tables(u32 start)
 {
-	unsigned long current;
+	u32 current;
 	struct acpi_rsdp *rsdp;
 	struct acpi_rsdt *rsdt;
 	struct acpi_xsdt *xsdt;