xcopy: increase the RCR_OP_MAX_SEGMENT_LEN to 16MB
The old value is 1024, this sg_xcopy will fail when we increase
the target device block size from 514 to 4096.
The error log as: "bpt too large (max 0 blocks)"
#define RCR_OP_MAX_TARGET_DESC_COUNT 0x02
#define RCR_OP_MAX_SEGMENT_DESC_COUNT 0x01
#define RCR_OP_MAX_DESC_LIST_LEN 1024
-#define RCR_OP_MAX_SEGMENT_LEN 1024
+#define RCR_OP_MAX_SEGMENT_LEN 16777216
#define RCR_OP_TOTAL_CONCURR_COPIES 0x01
#define RCR_OP_MAX_CONCURR_COPIES 0x01
#define RCR_OP_DATA_SEG_GRAN_LOG2 0x09
