platform: msm_shared: 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.

Change-Id: I4a8a72d7abe4b0e01277a51b69df3adaf04ca728
1 file changed