security/nss: enable aarch64 hardware crypto support

The diff below should enable aarch64 hardware crypto support in
security/nss.

The regression tests for NSS_TESTS=cipher run successfully on my
OverDrive 1000 (cpu0: CRC32,SHA2,SHA1,AES+PMULL,ASID16).
I can't really verify that the crypto instructions are actually
used, though.

Index: Makefile
===================================================================
RCS file: /cvs/ports/security/nss/Makefile,v
retrieving revision 1.152
diff -u -p -r1.152 Makefile
--- Makefile 29 Mar 2022 07:38:43 -0000 1.152
+++ Makefile 2 Apr 2022 18:31:54 -0000
@@ -4,6 +4,7 @@ VERSION= 3.76.1
# from https://hg.mozilla.org/projects/nss/file/tip/automation/release/nspr-version.txt
NSPR_VERSION= 4.32
DISTNAME= nss-${VERSION}
+REVISION= 0

SO_VERSION= 58.9
.for _lib in freebl3 nss3 nssckbi nssckbi-testlib nssdbm3 nssutil3 smime3 softokn3 ssl3
Index: patches/patch-nss_lib_freebl_blinit_c
===================================================================
RCS file: patches/patch-nss_lib_freebl_blinit_c
diff -N patches/patch-nss_lib_freebl_blinit_c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-nss_lib_freebl_blinit_c 2 Apr 2022 18:31:54 -0000
@@ -0,0 +1,36 @@
+Index: nss/lib/freebl/blinit.c
+
+Enable aarch64 hardware crypto support.
+
+--- nss/lib/freebl/blinit.c.orig
++++ nss/lib/freebl/blinit.c
+@@ -205,6 +205,12 @@ static unsigned long getauxval(unsigned long type)
+