MAINTAINERS: refer to intended file in STANDALONE CACHE CONTROLLER DRIVERS

Commit 23db6ee ("MAINTAINERS: Add Jonathan Cameron to drivers/cache
and add lib/cache_maint.c + header") intends to add a file entry pointing
to the cache_coherency.h file, but messes up to name the right path.

Update the entry to the intended file.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Author: bulwahn

MAINTAINERS

@@ -23972,7 +23972,7 @@ S:	Maintained
 T:	git https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/
 F:	Documentation/devicetree/bindings/cache/
 F:	drivers/cache
-F:	include/cache_coherency.h
+F:	include/linux/cache_coherency.h
 F:	lib/cache_maint.c
 
 STARFIRE/DURALAN NETWORK DRIVER