crypto/bio: fix build on UEFI

crypto/bio: fix build on UEFI

When compiling openssl for tianocore compiling abs_val() and pow_10()
fails with the following error because SSE support is disabled:

   crypto/bio/bio_print.c:587:46: error: SSE register return with SSE disabled

Fix that by using EFIAPI calling convention when compiling for UEFI.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17442)