ipmi: docs: don't advertise deprecated sysfs entries

"i2c-adapter" class entries are deprecated since 2009. Switch to the
proper location.

Reported-by: Heiner Kallweit <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]
Fixes: 2593070 ("ipmi: Add SMBus interface driver (SSIF)")
Signed-off-by: Wolfram Sang <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Corey Minyard <[email protected]>

Author: Wolfram Sang

Documentation/driver-api/ipmi.rst

@@ -540,7 +540,7 @@ at module load time (for a module) with::
 	alerts_broken
 
 The addresses are normal I2C addresses.  The adapter is the string
-name of the adapter, as shown in /sys/class/i2c-adapter/i2c-<n>/name.
+name of the adapter, as shown in /sys/bus/i2c/devices/i2c-<n>/name.
 It is *NOT* i2c-<n> itself.  Also, the comparison is done ignoring
 spaces, so if the name is "This is an I2C chip" you can say
 adapter_name=ThisisanI2cchip.  This is because it's hard to pass in