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[FHI72] [xran F] Handle fragmented (un)compressed packets In both E and F, the radio-transport fragmentation is not supported, and all the "fragmented" (not seen as fragments in the xran, only as sections) packets contain "E-bit" equal to 1. Per spec, the value 1 for "E-bit" signifies the last fragment of one symbol. For more info, please see "ecpriSeqid" section in the spec. In E: - nRBStart and nRBSize is updated according to the sent/received packet; - max sections = 1; - when a packet is fragmented, the xran uses memcpy(pos, iq_data_start, size) function, and nothing is stored in start_prbu , num_prbu ,... In F: - nRBStart and nRBSize is only used for C-plane messages; - nPrbElm represents the number of sections for DL only; - based on the nPrbElm, each section contains UP_nRBStart and UP_nRBSize parameters which represent the start and number of PRBs in one section or one fragment; - when a packet is fragmented, the xran uses nSecDesc and sec_desc to extract the packet section content, and the data is stored in start_prbu , num_prbu ,... Previous work on the fragmentation in F: - #884 - !3394 - only increases the XRAN_MAX_FRAGMENT from 4 to 6, since it was only tested with BFP 8, but not end-to-end unfortunately. But this MR fixes all the issues. Tested with VVDN RU, 2x2, 16 bits, 100MHz, 30kHz, MTU <= 9216 B, and Quectel UE RM520N-GL Revision: RM520NGLAAR03A03M4G.