MA-16877 Skip kernel hab authentication for android

MA-16877 Skip kernel hab authentication for android

Android use AVB to verify the kernel, hab authentication is
not necessary for boot image.

For imx8m, don't authenticate the kernel image when AVB
(CONFIG_AVB_SUPPORT) is enabled. For imx8q, as android uses
different 'CONFIG_EXTRA_ENV_SETTINGS' and 'CONFIG_BOOTCOMMAND'
with linux bsp, so it won't try to do kernel hab authentication.
by default.

Test: boot imx8mp with "CONFIG_IMX_HAB" and imx8qxp with
      'CONFIG_AHAB_BOOT'.

Change-Id: I1b2087ce7d8f9795422a053b6b68a694c86f0b3d
Signed-off-by: Ji Luo <ji.luo@nxp.com>
(cherry picked from commit f907e4ac090e960ba5110b8039cccc4296841595)
(cherry picked from commit f9f6ae742696f51326ec7da5b0c74a7fca21f774)