scsi: fnic: Use vcalloc() instead of vmalloc() and memset(0)

Use vcalloc() instead of vmalloc() followed by memset(0) to simplify the
functions fnic_trace_buf_init() and fnic_fc_trace_init().

Compile-tested only.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20241107104300.1252-1-thorsten.blum@linux.dev


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>