ppc: POWER7 has lq/stq instructions and stq need to check ISA
The PPC_64BX instruction flag is used for a couple of newer instructions currently on POWER8 but our implementation for them works for POWER7 too (and already does the proper checking of what is permitted) with one exception: stq needs to check the ISA version. This fixes the latter and add the instructions to POWER7 Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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