emulators/rpcs3: unbreak aarch64 build after a036b104b872

3rdparty/wolfssl/wolfssl/wolfcrypt/src/cpuid.c:262:28: error: use of undeclared identifier 'CPUID_AARCH64_FEAT_PMULL'

if (features & CPUID_AARCH64_FEAT_PMULL)
               ^

Reported by: pkg-fallout