acpi: Make header #ifdefs consistent

Now that all ACPI header files are moved to src/include/acpi, this
change updates the #ifdef to __ACPI_${FILENAME}__.

BUG=b:155428745

Change-Id: Id24ee35bac318278871a26f98be7092604de01c0
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40931
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
diff --git a/src/include/acpi/acpi.h b/src/include/acpi/acpi.h
index 5314d78..95080b2 100644
--- a/src/include/acpi/acpi.h
+++ b/src/include/acpi/acpi.h
@@ -5,8 +5,8 @@
  * coreboot ACPI support - headers and defines.
  */
 
-#ifndef __ASM_ACPI_H
-#define __ASM_ACPI_H
+#ifndef __ACPI_ACPI_H__
+#define __ACPI_ACPI_H__
 
 /*
  * The type and enable fields are common in ACPI, but the
@@ -1049,4 +1049,4 @@
 
 #endif  // !defined(__ASSEMBLER__) && !defined(__ACPI__) && !defined(__ROMC__)
 
-#endif  /* __ASM_ACPI_H */
+#endif  /* __ACPI_ACPI_H__ */