msm: isp: Fix dummy print which may leak address

Delete the print of an uninitialized local variable to prevent
kernel from leaking address to userspace

CRs-Fixed: 2004810
Change-Id: Ie1c473f6e652adb4a9d10865522483718fbdafcc
Signed-off-by: Junzhe Zou <jnzhezou@codeaurora.org>