Don't include platform_time.h if !MBEDTLS_HAVE_TIME
Don't include platform_time.h if !MBEDTLS_HAVE_TIME

platform_time.h includes time.h, which is not assumed to be present
on a system where MBEDTLS_HAVE_TIME is not defined.

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