ARM: bcm: Enable five Cygnus boards

bcm911360_entphn
bcm911360_entphn-ns
bcm911360k
bcm958300k-ns
bcm958305k

- updates to support Cygnus and NSP board families better
- add functions so CONFIG_ARMV7_NONSEC can be enabled on Cygnus boards

Signed-off-by: Steve Rae <srae@broadcom.com>
diff --git a/configs/bcm958300k_defconfig b/configs/bcm958300k_defconfig
index 066739d..527e407 100644
--- a/configs/bcm958300k_defconfig
+++ b/configs/bcm958300k_defconfig
@@ -1,3 +1,3 @@
-CONFIG_SYS_EXTRA_OPTIONS="SYS_SDRAM_SIZE=0x20000000"
+CONFIG_SYS_EXTRA_OPTIONS="SYS_SDRAM_SIZE=0x40000000"
 CONFIG_ARM=y
-CONFIG_TARGET_BCM958300K=y
+CONFIG_TARGET_BCMCYGNUS=y