[mpi_enc_test]: add slt testcase

slt verify file:
mpi_enc_test -w 4096 -h 2304 -t 7  -slt enc_xxx.verify -n 5
mpi_dec_test -i <inputfile>  -t 7  -slt dec_xxx.verify -n 5

Change-Id: I528fcd8d1adf8821c1555790cd8482108f219fdc
Signed-off-by: Hongjin Li <vic.hong@rock-chips.com>

utils/utils.h

@@ -30,7 +30,8 @@ typedef struct OptionInfo_t {
 
 typedef struct data_crc_t {
     RK_U32          len;
-    RK_U32          sum;
+    RK_U32          sum_cnt;
+    RK_ULONG        *sum;
     RK_U32          vor; // value of the xor
 } DataCrc;