msm: camera: isp: Halt device with the command parsed

In shutdown case rdi and ipp device should be closed immediately
instead of at frame boundary because in shutdown sensor would
close first and closing of ipp and rdi at frame boundary
will resuly in timeout.

Change-Id: Idad0304c6ce0a9ab4f9399753bbcf87bf8941c8b
Signed-off-by: Tejas Prajapati <tpraja@codeaurora.org>