Introduce lmp-common.cfg, which contains common options for all machines
for lmp distro. This approach helps to avoid duplication of Kconfig
options and is less prone to errors (lower possibility to miss
vital config option).

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>

Introduce lmp-common-nosec.cfg, which contains common options for machines,
that don´t have enabled signing in U-Boot.

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>

Drop options that are already set in lmp-common.cfg.
Force enable options for machines like qemuarm, qemuarm64, qemuriscv64,
rpi, sun8i, beaglebone-yocto, that doesn't have full support of LmP
boot sequence.

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>

Introduce lmp-common.cfg, which contains common options for all machines
for lmp-mfgtool distro. This approach helps to avoid duplication of Kconfig
options and is less prone to errors (lower possibility to miss
vital config option).

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>

Drop options that are already set in lmp-common.cfg.
Explicitly enable/disable options in some configs, where
it's not supposed to use default value from lmp-common.cfg.

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>