Build acpi kernel modules on aarch64

For now, the only kernel module built is acpi_ged.ko.

Sponsored by:	Netflix
Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D54315

sys/modules/Makefile

@@ -579,6 +579,7 @@ _mlx5ib=	mlx5ib
 
 .if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
     ${MACHINE_CPUARCH} == "i386"
+_acpi=		acpi
 _ena=		ena
 _gve=		gve
 _igc=		igc
@@ -776,7 +777,6 @@ _wdatwd=	wdatwd
 
 _aac=		aac
 _aacraid=	aacraid
-_acpi=		acpi
 .if ${MK_CRYPT} != "no" || defined(ALL_MODULES)
 _aesni=		aesni
 .endif

sys/modules/acpi/Makefile

@@ -1,9 +1,9 @@
+.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
 SUBDIR=	\
 	acpi_asus \
 	acpi_asus_wmi \
 	acpi_dock \
 	acpi_fujitsu \
-	acpi_ged \
 	acpi_hp \
 	acpi_ibm \
 	acpi_panasonic \
@@ -13,5 +13,9 @@ SUBDIR=	\
 	acpi_video \
 	acpi_wmi \
 	aibs
+.endif
+
+SUBDIR+= \
+	acpi_ged
 
 .include <bsd.subdir.mk>