[Bug] spr_eear not saving instruction address when illegal instruction exception

[JaewonHur]

As in spec,
EEAR register should save the instruction fetch VA when illegal instruction exception.

We should change code in mor1kx_ctrl_cappuccino.v as follow.

    always @(posedge clk `OR_ASYNC_RST)
     if (rst)
       spr_eear <= {OPTION_OPERAND_WIDTH{1'b0}};
     else if (/*padv_ctrl & exception*/ exception_re)
       begin
	  if (except_ibus_err_i | except_itlb_miss_i | except_ipagefault_i | except_illegal_i)
	    spr_eear <= pc_ctrl_i;
	  else if (except_dbus_i | except_dtlb_miss_i | except_dpagefault_i | except_align_i)
	    spr_eear <= ctrl_lsu_adr_i;
       end