arm: convert Cygnus and NSP boards to Kconfig

Convert the bcm958300k and the bcm958622hr boards from "boards.cfg" to Kconfig.

Signed-off-by: Steve Rae <srae@broadcom.com>
diff --git a/board/broadcom/bcm958300k/Kconfig b/board/broadcom/bcm958300k/Kconfig
new file mode 100644
index 0000000..165cee7
--- /dev/null
+++ b/board/broadcom/bcm958300k/Kconfig
@@ -0,0 +1,23 @@
+if TARGET_BCM958300K
+
+config SYS_CPU
+	string
+	default "armv7"
+
+config SYS_BOARD
+	string
+	default "bcm_ep"
+
+config SYS_VENDOR
+	string
+	default "broadcom"
+
+config SYS_SOC
+	string
+	default "bcmcygnus"
+
+config SYS_CONFIG_NAME
+	string
+	default "bcm_ep_board"
+
+endif