PCI: Add Silicom Denmark vendor ID

Update pci_ids.h with the vendor ID for Silicom Denmark. The define is
going to be referenced in driver(s) for FPGA accelerated smart NICs.

Link: https://lore.kernel.org/r/20210208150158.2877414-1-mhu@silicom.dk
Signed-off-by: Martin Hundebøll <mhu@silicom.dk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>

include/linux/pci_ids.h

@@ -2588,6 +2588,8 @@
 
 #define PCI_VENDOR_ID_REDHAT		0x1b36
 
+#define PCI_VENDOR_ID_SILICOM_DENMARK	0x1c2c
+
 #define PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS	0x1c36
 
 #define PCI_VENDOR_ID_CIRCUITCO		0x1cc8