parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK
Since commit 350e88ba ("mm: memblock: make keeping memblock memory opt-in rather than opt-out") the default behaviour is to discard memblock data after init and the ARCH_DISCARD_MEMBLOCK is obsolete. Remove it. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Helge Deller <deller@gmx.de>
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