dell-laptop: fix error return code in dell_init()

Fix to return -ENOMEM in the alloc_page() error handling
case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
1 file changed