Fix ChaCha assembly code on 32-bit HPUX itanium systems

Fix ChaCha assembly code on 32-bit HPUX itanium systems

This fixes the reported crashes 32-bit HPUX systems due to
raw out and inp pointer values, and adds one nop instruction
on 64-bit systems, like it is done in other assembly modules
for those systems.

The fix was tested by @johnkohl-hcl see:
https://github.com/openssl/openssl/issues/17067#issuecomment-1668468033

Fixes #17067

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21681)