ARM: cygnus defconfig : Initial defconfig for Broadcom Cygnus SoC

This defconfig is utilized so a customer or developer can understand
what kernel drivers are utilized by the Cygnus SoC.  It also enables
debug configs which should be disabled if optimal performance is
desired.

Tested-by: Jonathan Richardson <jonathar@broadcom.com>
Reviewed-by: JD (Jiandong) Zheng <jdzheng@broadcom.com>
Signed-off-by: Scott Branden <sbranden@broadcom.com>
ARM: bcm_defconfig/multi_v7_defconfig: remove one level of menu from Kconfig

remove menu "Broadcom Mobile SoC Selection"
This requires:
- selecting ARCH_BCM_MOBILE based on SoC selections
- fixup bcm_defconfig and multi_v7_defconfig to work with new menu levels.

Signed-off-by: Scott Branden <sbranden@broadcom.com>
ARM: multi_v7_defconfig: Enable Broadcom Cygnus

Enable Broadcom Cygnus platform support in multi_v7_defconfig

Signed-off-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Scott Branden <sbranden@broadcom.com>