msm: mdm: Fix error value for SHUTDOWN_CHARM ioctl

SHUTDOWN_CHARM should write the error value to the parameter
passed, but in this case as no error value is updated.

CRs-Fixed: 424291
Change-Id: I33f6cbc35bfaebfdfad2e67edbfb05e2037d0006
Signed-off-by: Taniya Das <tdas@codeaurora.org>
1 file changed