Do not check definition of a macro and use it in a single condition

Do not check definition of a macro and use it in a single condition

The condition evaluation in #if conditions does not tolerate this
if the macro is not defined.

Fixes #19628

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20018)

(cherry picked from commit a509b97d2c4efd96e231913d49544ac7cb36b51b)