soc: qcom: dcc: Use sscanf instead of strlcpy

When we write string on sysfs node it appends '\n' at the end which
modifies passed string. 'strlcpy' does not take care of removing '\n'
so use sscanf which truncate '\n' from the original string.

Change-Id: Id99124f380ad4dc3c9c0ffcaee045304f131844e
CRs-Fixed: 2193257
Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>