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.h b/drivers/firewire/core.h
index 8280c62..3000dd7 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -78,8 +78,8 @@
 	int (*enable_phys_dma)(struct fw_card *card,
 			       int node_id, int generation);
 
-	u32 (*read_csr_reg)(struct fw_card *card, int csr_offset);
-	void (*write_csr_reg)(struct fw_card *card, int csr_offset, u32 value);
+	u32 (*read_csr)(struct fw_card *card, int csr_offset);
+	void (*write_csr)(struct fw_card *card, int csr_offset, u32 value);
 
 	struct fw_iso_context *
 	(*allocate_iso_context)(struct fw_card *card,