add back i2c_xxxx_func prototypes inadvertently removed which prevented compile

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1721 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/busses/i2c-ipmb.c

@@ -31,6 +31,7 @@
 #include "version.h"
 
 
+static u32 i2c_ipmb_func(struct i2c_adapter *adapter);
 int ipmb_access(struct i2c_adapter *adap,struct i2c_msg msgs[], 
 	                   int num);
 

kernel/busses/i2c-ipmi.c

@@ -31,6 +31,7 @@
 #include "version.h"
 
 
+static u32 i2c_ipmi_func(struct i2c_adapter *adapter);
 static int bmcclient_i2c_send_message(struct i2c_adapter *, char *, int);
 
 /* I2C Data */