RT4318: Fix OSSL_SSIZE_MAX for UEFI build
RT4318: Fix OSSL_SSIZE_MAX for UEFI build

Commit e634b448c ("Defines OSSL_SSIZE_MAX") introduced a definition of
OSSL_SSIZE_MAX which broke the UEFI build. Fix that by making UEFI take
the same definition as Ultrix (ssize_t == int).

Signed-off-by: Rich Salz <c04971a99e5a9ee80eaab4b1deb37e845b0bd697@openssl.org>
Reviewed-by: Matt Caswell <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl