firmware: stratix10-svc: reset COMMAND_RECONFIG_FLAG_PARTIAL to 0

Clean up COMMAND_RECONFIG_FLAG_PARTIAL flag by resetting it to 0, which
aligns with the firmware settings.

Fixes: 36847f9e ("firmware: stratix10-svc: correct reconfig flag and timeout values")
Signed-off-by: Richard Gong <richard.gong@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>