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/bcm911360_entphn_defconfig b/configs/bcm911360_entphn_defconfig
new file mode 100644
index 0000000..37b5846
--- /dev/null
+++ b/configs/bcm911360_entphn_defconfig
@@ -0,0 +1,3 @@
+CONFIG_SYS_EXTRA_OPTIONS="SYS_SDRAM_SIZE=0x20000000"
+CONFIG_ARM=y
+CONFIG_TARGET_BCMCYGNUS=y