Fix size macros and its documentation
Fix size macros and its documentation

Signed-off-by: gabor-mezei-arm <73922791ae56b2f06debbf18b6e0a93a4bcd29f9@arm.com>

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