roms: re-remove execute bit from hppa-firmware*

This was fixed in c9d7752 for
9.2.0 but regressed in db34be3 in
10.0.0

When the bit is present, rpmbuild complains about missing ELF build-id

Signed-off-by: Cole Robinson <[email protected]>
Reviewed-by: Daniel P. Berrangé <[email protected]>
Acked-by: Helge Deller <[email protected]>
Message-ID: <52d0edfbb9b2f63a866f0065a721f3a95da6f8ba.1747590860.git.crobinso@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
(cherry picked from commit a598090ebaeb930ce33c2df0d80d87da13be8848)
Signed-off-by: Michael Tokarev <[email protected]>

Author: crobinso