RT4320/GH705: Fix PEM parsing bug.
RT4320/GH705: Fix PEM parsing bug.

Also removing confusing pointer-alias variable.
Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>

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