[POWERPC] Check cache coherency of kernel vs firmware

check_cache_coherency() verifies that the cache coherency setting of
the kernel (CONFIG_NOT_COHERENT_CACHE) matches that left by the firmware,
as indicated by coherency-off device tree property.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/embedded6xx/Kconfig

@@ -49,6 +49,7 @@ config MPC10X_BRIDGE
 config MV64X60
 	bool
 	select PPC_INDIRECT_PCI
+	select CONFIG_CHECK_CACHE_COHERENCY
 
 config MPC10X_OPENPIC
 	bool