parisc: Mark altinstructions read-only and 32-bit aligned

stable inclusion
from stable-v6.6.5
commit 3b6ff6bb7e877ad4c424a62872132ac08c35fafb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8N21P

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3b6ff6bb7e877ad4c424a62872132ac08c35fafb



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commit 33f806da2df68606f77d7b892cd1298ba3d463e8 upstream.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>