msm: restart: change the EDLOAD boot option to USB

Currenlty forced EDLOAD boot option(0x2) uses SD card followed by USB
as boot options. SD card boot option is not supported. So select
the forced EDLOAD boot opition(0x1) as USB only.

CRs-Fixed: 684609
Change-Id: I4a8519986928aec81b0950d7468c4c4ac338aae0
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>