Fix compilation warning on MSVC
Fix compilation warning on MSVC

MSVC complains about the negation in `(uint32_t) -1u`. This commit fixes this by
using `(uint32_t) -1` instead.

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