acpi: Move function prototype

Allow other architectures to use acpi_create_mcfg_mmconfig as well
by moving the function prototype to common code.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h
index 5a30465..07c5f65 100644
--- a/include/acpi/acpi_table.h
+++ b/include/acpi/acpi_table.h
@@ -995,6 +995,19 @@
 int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags);
 
 /**
+ * acpi_create_mcfg_mmconfig() - Create a MCFG table entry
+ *
+ * @mmconfig: Place to put the table
+ * @base: Base address of the ECAM space
+ * @seg_nr: PCI segment number
+ * @start: PCI bus start number
+ * @end: PCI bus end number
+ * Return: size of data written in bytes
+ */
+int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base,
+			      u16 seg_nr, u8 start, u8 end);
+
+/**
  * acpi_create_dbg2() - Create a DBG2 table
  *
  * This table describes how to access the debug UART