module: resync part of Makefile.bsd

sha256-armv8.S and sha512-armv8.S need the same treatment as the sse
bits; removal of -mgeneral-regs-only from flags.

This fixes errors about requiring NEON, which is a difference in clang
vs. gcc treatment of -mgeneral-regs-only being specified on asm files.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Closes #14715

Author: kevans91

module/Makefile.bsd

@@ -507,6 +507,16 @@ CFLAGS.zstd_lazy.c+= ${__ZFS_ZSTD_AARCH64_FLAGS}
 CFLAGS.zstd_ldm.c+= ${__ZFS_ZSTD_AARCH64_FLAGS}
 CFLAGS.zstd_opt.c+= ${__ZFS_ZSTD_AARCH64_FLAGS}
 
+sha256-armv8.o: sha256-armv8.S
+	${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${.IMPSRC} \
+	     -o ${.TARGET}
+	${CTFCONVERT_CMD}
+
+sha512-armv8.o: sha512-armv8.S
+	${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${.IMPSRC} \
+	     -o ${.TARGET}
+	${CTFCONVERT_CMD}
+
 b3_aarch64_sse2.o: b3_aarch64_sse2.S
 	${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${.IMPSRC} \
 	     -o ${.TARGET}