src/tls13.c: in DoTls13ServerHello() WOLFSSL_ASYNC_CRYPT path, fix -Wdeclaration-after-statement caused by fallthrough definition;

.github/workflows: update async.yml, multi-arch.yml, multi-compiler.yml, no-malloc.yml, opensslcoexist.yml, and os-check.yml, with -pedantic and related flags, and add --enable-riscv-asm to multi-arch.yml RISC-V scenario;

configure.ac: clarify error message for "SP ASM not available for CPU."

.github/workflows/multi-arch.yml

@@ -30,6 +30,7 @@ jobs:
           - HOST: riscv64-linux-gnu
             CC: riscv64-linux-gnu-gcc
             ARCH: riscv64
+            EXTRA_OPTS: --enable-riscv-asm
           # Config to ensure CPUs without Thumb instructions compiles
           - HOST: arm-linux-gnueabi
             CC: arm-linux-gnueabi-gcc
@@ -51,7 +52,7 @@ jobs:
             CC: ${{ matrix.CC }}
             CFLAGS: ${{ matrix.CFLAGS }}
             QEMU_LD_PREFIX: /usr/${{ matrix.HOST }}
-        run: ./autogen.sh && ./configure --host=${{ matrix.HOST }} --enable-all --disable-examples ${{ matrix.EXTRA_OPTS }} && make
+        run: ./autogen.sh && ./configure --host=${{ matrix.HOST }} --enable-all --disable-examples CPPFLAGS="-pedantic -Wdeclaration-after-statement -DTEST_LIBWOLFSSL_SOURCES_INCLUSION_SEQUENCE -DWOLFCRYPT_TEST_LINT" ${{ matrix.EXTRA_OPTS }} && make
       - name: Print errors
         if: ${{ failure() }}
         run: |