The bhie field in mhi_cntrl needs to be initialized to proper register
base in order to make mhi_rddm_prepare() to work. Otherwise,
mhi_rddm_prepare() will cause NULL pointer dereference.
Fixes: 6fdfdd27328c ("bus: mhi: core: Add support for downloading RDDM image during panic")
Reported-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>