skip ACPI0007 on arm64 as well.  use namespace friendly defines.

Index: sys/dev/acpi/acpi.c
===================================================================
RCS file: /cvsroot/src/sys/dev/acpi/acpi.c,v
retrieving revision 1.288
diff -p -u -r1.288 acpi.c
--- sys/dev/acpi/acpi.c	13 Dec 2020 20:24:26 -0000	1.288
+++ sys/dev/acpi/acpi.c	20 Dec 2020 00:52:01 -0000
@@ -163,8 +163,10 @@ struct acpi_walkcontext {
  * Ignored HIDs.
  */
 static const char * const acpi_ignored_ids[] = {
-#if defined(i386) || defined(x86_64)
+#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
 	"ACPI0007",	/* ACPI CPUs do not attach to acpi(4) */
+#endif
+#if defined(__i386__) || defined(__x86_64__)
 	"PNP0000",	/* AT interrupt controller is handled internally */
 	"PNP0001",	/* EISA interrupt controller is handled internally */
 	"PNP0200",	/* AT DMA controller is handled internally */
@@ -173,7 +175,7 @@ static const char * const acpi_ignored_i
 	"PNP0C02",	/* PnP motherboard resources */
 	"PNP0C0F",	/* ACPI PCI link devices are handled internally */
 #endif
-#if defined(x86_64)
+#if defined(__x86_64__)
 	"PNP0C04",	/* FPU is handled internally */
 #endif
 #if defined(__aarch64__)