amba sdk环境搭建

cv22_auto_2.0.3_20190808
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Patch to SDK(cv22_linux_sdk_2.0_20190531.tar.xz)

Usage:
1.Extract Linux kernel in cv22_linux_sdk_2.0
    $ cd cv22_linux_sdk_2.0/ambarella
    $ export TOOLCHAIN_PATH=1
    $ cd boards/cv22_walnut
    $ make sync_build_mkcfg
    $ make cv22_ipcam_config
    $ source ../../build/env/aarch64-linaro-gcc.env

2.Extract cv22_auto_2.0.3_20190808.tar.bz2 under cv22_linux_sdk_2.0/(in the same folder as ambarella/)
    $ cd cv22_linux_sdk_2.0
    $ tar xjf cv22_auto_2.0.3_20190808.tar.bz2 --same-permissions

3.Apply the patch for source file.
    $ cd cv22_auto_2.0.3_20190808
    $ chmod +x apply.sh
    $ ./apply.sh

4.Make
    $ cd cv22_linux_sdk_2.0/ambarella/boards/cv22_walnut
    $ make sync_build_mkcfg
    $ make cv22_ipcam_config
    $ make defconfig_public_linux
    $ make -j8