tss2_tcti.h: Define TCTI poll handle type for _WIN32 platforms.
tss2_tcti.h: Define TCTI poll handle type for _WIN32 platforms.

On windows this should be a HANDLE. This requires that we include
windows.h first.

Signed-off-by: Philip Tricca <fd418754d31777cf39b16b99b0350486ab840079@intel.com>

tpm2-software/tpm2-tss,tpm2-software/tpm2-tss,01org/TPM2.0-TSS,01org/tpm2-tss,01org/TPM2.0-TSS,01org/tpm2-tss,tpm2-software/tpm2-tss,01org/TPM2.0-TSS,01org/TPM2.0-TSS,01org/tpm2-tss