powerpc32: adds handling of _PAGE_RO
Some powerpc like the 8xx don't have a RW bit in PTE bits but a RO (Read Only) bit. This patch implements the handling of a _PAGE_RO flag to be used in place of _PAGE_RW Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr> [scottwood@freescale.com: fix whitespace] Signed-off-by: NScott Wood <scottwood@freescale.com>
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