Revert "x86: Increase brk randomness entropy for 64-bit systems"

Revert "x86: Increase brk randomness entropy for 64-bit systems"

Origin: https://lore.kernel.org/stable/202411210628.ECF1B494D7@keescook/
Bug-Debian: https://bugs.debian.org/1085762

This reverts commit b0cde867b80a5e81fcbc0383e138f5845f2005ee which is
commit 44c76825d6eefee9eb7ce06c38e1a6632ac7eb7d upstream.

There seems to be a bad interaction between this change and older
PIE-built qemu-user-static (for aarch64) binaries.

Link: https://lore.kernel.org/all/202411201000.F3313C02@keescook/
Link: https://bugs.debian.org/1085762
Signed-off-by: Salvatore Bonaccorso <carnil@debian.org>
Gbp-Pq: Topic bugfix/x86
Gbp-Pq: Name Revert-x86-Increase-brk-randomness-entropy-for-64-bi.patch