linux/export: Fix alignment for 64-bit ksymtab entries

linux/export: Fix alignment for 64-bit ksymtab entries

[ Upstream commit f6847807c22f6944c71c981b630b9fff30801e73 ]

An alignment of 4 bytes is wrong for 64-bit platforms which don't define
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS (which then store 64-bit pointers).
Fix their alignment to 8 bytes.

Fixes: ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost")
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>