Use typedef names in evp.h.

They're all forward-declared. There's no need to use the struct names.

Change-Id: I435ae2f5971128f08c730317ca644d97239f3b54
Reviewed-on: https://boringssl-review.googlesource.com/5260
Reviewed-by: Adam Langley <agl@google.com>
1 file changed