PCI: vmd: Fix malformed Kconfig default

'default N' should be 'default n', though they happen to have the same
effect here, due to undefined symbols (N in this case) evaluating to n
in a tristate sense.

Remove the default instead of changing it. bool and tristate symbols
implicitly default to n.

Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/Kconfig

@@ -215,7 +215,6 @@ config PCIE_TANGO_SMP8759
 config VMD
 	depends on PCI_MSI && X86_64 && SRCU
 	tristate "Intel Volume Management Device Driver"
-	default N
 	---help---
 	  Adds support for the Intel Volume Management Device (VMD). VMD is a
 	  secondary PCI host bridge that allows PCI Express root ports,