mec1322: Fix uninitialized variable.
mec1322: Fix uninitialized variable.

This patch fixes a reported error for an uninitialized return variable.

BUG=none
TEST=Build and Test EC.
BRANCH=none

Change-Id: I43a6678049070ef1ee6c71dfbac1fcb21de88957
Signed-off-by: Shaunak Saha <6443be5308642426809eac7df8fed026f68e8b2f@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/317352
Commit-Ready: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>
Tested-by: Divya Jyothi <7fa6690d0a542ccce445e16fba24c5f6700e0873@intel.com>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec