x86 acpi: remove ALIGN_CURRENT macro

The ALIGN_CURRENT macro relied on a local variable name
as well as being defined in numerous compilation units.
Replace those instances with an acpi_align_current()
inline function.

Change-Id: Iab453f2eda1addefad8a1c37d265f917bd803202
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12707
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/mainboard/getac/p470/acpi_tables.c b/src/mainboard/getac/p470/acpi_tables.c
index 7228f5c..34d6f34 100644
--- a/src/mainboard/getac/p470/acpi_tables.c
+++ b/src/mainboard/getac/p470/acpi_tables.c
@@ -81,7 +81,6 @@
 	return header->length;
 }
 
-#define ALIGN_CURRENT current = (ALIGN(current, 16))
 unsigned long mainboard_write_acpi_tables(device_t device,
 					  unsigned long start,
 					  acpi_rsdp_t *rsdp)
@@ -92,12 +91,12 @@
 	current = start;
 
 	/* Align ACPI tables to 16byte */
-	ALIGN_CURRENT;
+	current = acpi_align_current(current);
 
 	printk(BIOS_DEBUG, "ACPI:     * ECDT\n");
 	ecdt = (acpi_header_t *)current;
 	current += acpi_create_ecdt((acpi_ecdt_t *)current);
-	ALIGN_CURRENT;
+	current = acpi_align_current(current);
 	acpi_add_table(rsdp, ecdt);
 
 	printk(BIOS_DEBUG, "current = %lx\n", current);