IS_ERR_VALUE should be used only with unsigned long type,
signed types should use comparison 'ret < 0'

This patch removes such usages.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NMark Brown <broonie@kernel.org>