Ensure client mbedtls_ssl_handshake_step() returns success for HELLO_REQUEST
Ensure client mbedtls_ssl_handshake_step() returns success for HELLO_REQUEST

Signed-off-by: Tom Cosgrove <c6e7a4d0c027d32c62bc9570c565a01587ef99be@arm.com>

Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls