s390/pci: increase the PCI_NR_FUNCTIONS default

Users complained that they are hitting the limit of 64 functions (some
physical functions can spawn lots of virtual functions). Double the
default limit. With the latest savings in static data usage this
increases the image size by only 520 bytes.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/Kconfig

@@ -624,7 +624,7 @@ if PCI
 config PCI_NR_FUNCTIONS
 	int "Maximum number of PCI functions (1-4096)"
 	range 1 4096
-	default "64"
+	default "128"
 	help
 	  This allows you to specify the maximum number of PCI functions which
 	  this kernel will support.