0e82e5c1fa
FSI CFAMs support shorter commands that use a relative (or same) address as the last. This change introduces a last_addr to the master state, and uses it for subsequent reads/writes, and performs relative addressing when a subsequent read/write is in range. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Tested-by: Joel Stanley <joel@jms.id.au>