or1k_du_mohor: fix in_status mask
or1k_du_mohor: remove unnecessary endian swap
Revert "or1k_du_mohor: remove unnecessary endian swap"

This reverts commit 55a3a16554e474b502b66b2117aec046eaa32361.
or1k_du_mohor: remove unnecessary jtag_add_dr_scans
or1k_olimex_mohor.tcl: set adapter_speed to 3MHz
or1k_du_adv: add log message at end of init
or1k_du_mohor: remove ADBG_CRC_POLY define