PCI: Include pci/hotplug Kconfig directly from pci/Kconfig

Include pci/hotplug/Kconfig directly from pci/Kconfig, so arches don't
have to source both pci/Kconfig and pci/hotplug/Kconfig.

Note that this effectively adds pci/hotplug/Kconfig to the following
arches, because they already sourced drivers/pci/Kconfig but they
previously did not source drivers/pci/hotplug/Kconfig:

  alpha
  arm
  avr32
  frv
  m68k
  microblaze
  mn10300
  sparc
  unicore32

Inspired-by-patch-from: Bogicevic Sasa <brutallesale@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/parisc/Kconfig

@@ -110,8 +110,6 @@ config IOMMU_HELPER
 
 source "drivers/pcmcia/Kconfig"
 
-source "drivers/pci/hotplug/Kconfig"
-
 endmenu
 
 menu "PA-RISC specific drivers"