i2c: Rename i2c_bus to I2CBus

Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h
index e3069bf..926603f 100644
--- a/include/hw/i2c/pm_smbus.h
+++ b/include/hw/i2c/pm_smbus.h
@@ -2,7 +2,7 @@
 #define PM_SMBUS_H
 
 typedef struct PMSMBus {
-    i2c_bus *smbus;
+    I2CBus *smbus;
     MemoryRegion io;
 
     uint8_t smb_stat;