ub: add memory map api in ubcore

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Add ubcore_umem_get and ubcore_umem_release api,
which support hw drivers use it to register physical memory and dma map it
for jetty queue and segment.

Input parameter:
dev: contains vendor-defined private device data.
va: specifies the VA address to be mapped.
len: length of the address space to be allocated and mapped by DMA.
flag: indicates the flag.

Signed-off-by: Guoxin Qian <qianguoxin@huawei.com>
Signed-off-by: Yizhen Fan <fanyizhen@huawei.com>