ti-j72xx: update kernel configs to support TI SDK 8.0

With the update of TI SDK 8.0, some kernel configs are dropped
like CONFIG_ARCH_K3_J721E_SOC/CONFIG_ARCH_K3_AM6_SOC, and added some
new kernel configs like CONFIG_REGULATOR and so on.

Signed-off-by: Xulin Sun <xulin.sun@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>