benchmark: Enable RSA benchmarks

The current Mbed TLS benchmark application requires MBEDTLS_GENPRIME
(RSA key generation) to be enabled in order to benchmark RSA. Mbed OS
doesn't enable MBEDTLS_GENPRIME by default, so add it to our
application-specific Mbed TLS configuration file.

Update the expected log output to reflect the freshly enabled RSA
benchmarks.

Author: Patater

benchmark/mbedtls_config.h

@@ -89,6 +89,10 @@
 #define MBEDTLS_RSA_C
 #endif
 
+#if !defined(MBEDTLS_GENPRIME)
+#define MBEDTLS_GENPRIME
+#endif
+
 #if !defined(MBEDTLS_ECDSA_C)
 #define MBEDTLS_ECDSA_C
 #endif

tests/benchmark.log

@@ -36,6 +36,10 @@
 \s+HMAC_DRBG SHA-1 (PR)\s*:\s*\d+ KB/s,\s*\d+ cycles/byte
 \s+HMAC_DRBG SHA-256 (NOPR)\s*:\s*\d+ KB/s,\s*\d+ cycles/byte
 \s+HMAC_DRBG SHA-256 (PR)\s*:\s*\d+ KB/s,\s*\d+ cycles/byte
+\s+RSA-2048\s*:\s*\d+ public/s
+\s+RSA-2048\s*:\s*\d+ private/s
+\s+RSA-4096\s*:\s*\d+ public/s
+\s+RSA-4096\s*:\s*\d+ private/s
 \s+ECDSA-secp384r1\s*:\s*\d+ sign/s
 \s+ECDSA-secp256r1\s*:\s*\d+ sign/s
 \s+ECDSA-secp384r1\s*:\s*\d+ verify/s