ACE-LITE awakeup/axcache/axprot信号

awakeup
1、spec description
awakeup: Indicates that activity is initiated on the write or read
address channels.指示在写或者读地址通道上的业务启动。
2、该信号用于AXI5和ACE-LITE spec中。
awakeup不止与aw通道相关，同样与ar通道相关。awvalid或arvalid拉起，awakeup必须拉起。
axcache
axi3中axcache如下：

AxCACHE Value Transaction attribute
[0]     0     Non-bufferable
        1     Bufferable
[1]     0     Non-cacheable
        1     Cacheable
[2]     0     No Read-Allocate
        1     Read-Allocate
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