firewire: rename CSR access driver methods

Rather than "read a Control and Status Registers (CSR) Architecture
register" I prefer to say "read a Control and Status Register".

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index 2e62516..32a33da 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -1044,7 +1044,7 @@
 
 	local_irq_disable();
 
-	cycle_time = card->driver->read_csr_reg(card, CSR_CYCLE_TIME);
+	cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
 
 	switch (a->clk_id) {
 	case CLOCK_REALTIME:      getnstimeofday(&ts);                   break;