mhi: core: force a hardware reset if device failed to enter rddm

If device fail to enter ramdump mode (rddm) gracefully, trigger
a hardware reset to force rddm mode.

CRs-Fixed: 2373857
Change-Id: If1fd02ff6da882df6b2db858b410d76ac8b0f1a8
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>