msm: adsp-loader: Add support for adsp state in adsp loader

MDM9625 does not use PIL. ADSP is loaded by SBL
at boot. ADSP state should be set to loaded for
MDM9625. APR requires that ADSP is in loaded
state before registering.

Change-Id: Iaaf979c30389e395079120a5c3cbbef2a9c3e8a8
Signed-off-by: Venkat Sudhir <vsudhir@codeaurora.org>