gnu: linux-libre: Build the VMD driver module.

Requested by PsixisP on #guix:

  “I have a laptop that requires CONFIG_VMD (Intel's software RAID) in
   order for the kernel to see the internal NVMe drive.  This is not
   present in the default Guix kernel.”

* gnu/packages/aux-files/linux-libre/4.14-x86_64.conf,
gnu/packages/aux-files/linux-libre/4.19-x86_64.conf,
gnu/packages/aux-files/linux-libre/4.9-x86_64.conf,
gnu/packages/aux-files/linux-libre/5.10-x86_64.conf,
gnu/packages/aux-files/linux-libre/5.12-x86_64.conf,
gnu/packages/aux-files/linux-libre/5.4-x86_64.conf:
Enable modular CONFIG_VMD.

gnu/packages/aux-files/linux-libre/4.14-x86_64.conf

@@ -879,7 +879,7 @@ CONFIG_HOTPLUG_PCI_SHPC=m
 #
 # PCI host controller drivers
 #
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 
 #
 # PCI Endpoint

gnu/packages/aux-files/linux-libre/4.19-x86_64.conf

@@ -630,7 +630,7 @@ CONFIG_HOTPLUG_PCI_SHPC=y
 #
 # Cadence PCIe controllers support
 #
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 
 #
 # DesignWare PCI Core Support

gnu/packages/aux-files/linux-libre/4.9-x86_64.conf

@@ -816,7 +816,7 @@ CONFIG_HOTPLUG_PCI_SHPC=m
 # PCI host controller drivers
 #
 # CONFIG_PCIE_DW_PLAT is not set
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 # CONFIG_ISA_BUS is not set
 CONFIG_ISA_DMA_API=y
 CONFIG_AMD_NB=y

gnu/packages/aux-files/linux-libre/5.10-x86_64.conf

@@ -2104,7 +2104,7 @@ CONFIG_HOTPLUG_PCI_SHPC=y
 #
 # PCI controller drivers
 #
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 CONFIG_PCI_HYPERV_INTERFACE=m
 
 #

gnu/packages/aux-files/linux-libre/5.12-x86_64.conf

@@ -2119,7 +2119,7 @@ CONFIG_HOTPLUG_PCI_SHPC=y
 #
 # PCI controller drivers
 #
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 CONFIG_PCI_HYPERV_INTERFACE=m
 
 #

gnu/packages/aux-files/linux-libre/5.4-x86_64.conf

@@ -2052,7 +2052,7 @@ CONFIG_HOTPLUG_PCI_SHPC=y
 #
 # end of Cadence PCIe controllers support
 
-# CONFIG_VMD is not set
+CONFIG_VMD=m
 CONFIG_PCI_HYPERV_INTERFACE=m
 
 #