i2c: cpm: Remove linux,i2c-index conversion from be32

sparse reports an error on some data that gets converted from be32.

That's because that data is typed u32 instead of __be32.

The type is correct, the be32_to_cpu() conversion is not.

Remove the conversion.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312042210.QL4DA8Av-lkp@intel.com/Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-By: Jochen Friedrich <jochen@scram.de>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-cpm.c

@@ -658,7 +658,7 @@ static int cpm_i2c_probe(struct platform_device *ofdev)
 	/* register new adapter to i2c module... */
 
 	data = of_get_property(ofdev->dev.of_node, "linux,i2c-index", &len);
-	cpm->adap.nr = (data && len == 4) ? be32_to_cpup(data) : -1;
+	cpm->adap.nr = (data && len == 4) ? *data : -1;
 	result = i2c_add_numbered_adapter(&cpm->adap);
 
 	if (result < 0)