mhi: core: skip MHI state SYS_ERR handling if RDDM is supported

Controllers that support RDDM mode does not handle optional
SYS_ERR to RDDM transition well. Instead of handling SYS_ERR
transition, jump straight to ramdump transfer by programming
RXVEC registers during boot.

CRs-Fixed: 2459474
Change-Id: If39989520b161bc073a552cd4bf048283cf1d8e4
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>