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H A Dhead_44x.Sdiff 97b3be1e9404f4c1645f3286428abd4d2052041e Wed Aug 06 02:03:09 CDT 2014 Alistair Popple <alistair@popple.id.au> powerpc/ppc476: Disable BTAC

This patch disables the branch target address CAM which under specific
circumstances may cause the processor to skip execution of 1-4
instructions. This fixes IBM Erratum #47.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>