staging: comedi: plx9080.h: add hard-coded PCIHIDR register value

For the PLX PCI 9080, the read-only PCIHIDR register is hard-coded with
the value `0x908010b5`.  Add a macro `PLX_PCIHIDR_9080` that expands to
this value.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/plx9080.h

@@ -446,6 +446,9 @@ struct plx_dma_desc {
 /* PCI Permanent Configuration ID Register (hard-coded PLX vendor and device) */
 #define PLX_REG_PCIHIDR		0x0070
 
+/* Hard-coded ID for PLX PCI 9080 */
+#define PLX_PCIHIDR_9080	0x908010b5
+
 /* PCI Permanent Revision ID Register (hard-coded silicon revision) (8-bit). */
 #define PLX_REG_PCIHREV		0x0074