firewire: core: add CSR abdicate support

Implement the abdicate bit, which is required for bus manager
capable nodes and tested by the Base 1394 Test Suite.

Finally, something to do at a command reset!  :-)

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index aaecdd1..a9ace1f 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -41,6 +41,7 @@
 #define FEATURE_PRIORITY_BUDGET		0x01
 
 #define CSR_STATE_BIT_CMSTR	(1 << 8)
+#define CSR_STATE_BIT_ABDICATE	(1 << 10)
 
 struct fw_card_driver {
 	/*