ossl(4): Install the man page also for arm64

In 22bd0c9731 ossl(4) was ported to arm64. The manual page was
adapted, but never installed since the ossl(4) manual page was
i386 / amd64 only.

Reviewed by:	mhorne
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D29762

share/man/man4/Makefile

@@ -833,7 +833,6 @@ _ntb_transport.4=ntb_transport.4
 _nvd.4=		nvd.4
 _nvme.4=	nvme.4
 _nvram.4=	nvram.4
-_ossl.4=	ossl.4
 _padlock.4=	padlock.4
 _pchtherm.4=	pchtherm.4
 _qat.4=		qat.4
@@ -887,6 +886,11 @@ _nvd.4= 	nvd.4
 _nvme.4=	nvme.4
 .endif
 
+.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" || \
+	 ${MACHINE_CPUARCH} == "aarch64"
+_ossl.4=	ossl.4
+.endif
+
 .if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "aarch64" || \
 	 ${MACHINE_CPUARCH} == "riscv"
 _cgem.4=	cgem.4