MAINTAINERS: Add powerpc drivers to the powerpc section

We'd like folks working on drivers for powerpc to also Cc linuxppc-dev,
so we can be aware of what's going on in drivers and/or review the
changes.

So add patterns to the powerpc MAINTAINERS section to catch some of the
drivers we're interested in.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

MAINTAINERS

@@ -6608,6 +6608,19 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
 S:	Supported
 F:	Documentation/powerpc/
 F:	arch/powerpc/
+F:	drivers/char/tpm/tpm_ibmvtpm*
+F:	drivers/crypto/nx/
+F:	drivers/crypto/vmx/
+F:	drivers/net/ethernet/ibm/ibmveth.*
+F:	drivers/net/ethernet/ibm/ibmvnic.*
+F:	drivers/pci/hotplug/rpa*
+F:	drivers/scsi/ibmvscsi/
+N:	opal
+N:	/pmac
+N:	powermac
+N:	powernv
+N:	[^a-z0-9]ps3
+N:	pseries
 
 LINUX FOR POWER MACINTOSH
 M:	Benjamin Herrenschmidt <benh@kernel.crashing.org>