iwlegacy: rename il_{read,write}32 to _il_{rd,wr}

Introduce rule that underscore at the beginning mean unlocked I/O method.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/iwl-3945.c b/drivers/net/wireless/iwlegacy/iwl-3945.c
index cf47fdb..6e2e71a 100644
--- a/drivers/net/wireless/iwlegacy/iwl-3945.c
+++ b/drivers/net/wireless/iwlegacy/iwl-3945.c
@@ -1058,7 +1058,7 @@
 
 int il3945_hw_get_temperature(struct il_priv *il)
 {
-	return il_read32(il, CSR_UCODE_DRV_GP2);
+	return _il_rd(il, CSR_UCODE_DRV_GP2);
 }
 
 /**
@@ -2211,7 +2211,7 @@
 		FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
 
 	/* fake read to flush all prev. writes */
-	il_read32(il, FH39_TSSR_CBB_BASE);
+	_il_rd(il, FH39_TSSR_CBB_BASE);
 
 	return 0;
 }