parisc: Reduce size of the bug_table on 64-bit kernel by half

[ Upstream commit 43266838

 ]

Enable GENERIC_BUG_RELATIVE_POINTERS which will store 32-bit relative
offsets to the bug address and the source file name instead of 64-bit
absolute addresses. This effectively reduces the size of the
bug_table[] array by half on 64-bit kernels.

Signed-off-by: Helge Deller <deller@gmx.de>
Stable-dep-of: 48763575

 ("parisc: Fix asm operand number out of range build error in bug table")
Signed-off-by: Sasha Levin <sashal@kernel.org>