Kconfig: Add BL1 and BL2 Kconfig configs

bl1/Kconfig and bl2/ext/mcuboot/Kconfig are based on related
CMAKE config files. As these two modules join into the Kconfig
menu, CMAKE include process in kconfig.cmake can be dropped.

Signed-off-by: Jianliang Shen <jianliang.shen@arm.com>
Change-Id: I288fabab9adb66028125fa0b7065e2e39e2420a5
10 files changed