arm: Remove more remnants of bcmcygnus

Remove some leftover files from the bcmcygnus platform.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index bdd535f..97c25b4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -357,7 +357,7 @@
 
 choice
 	prompt "Select the ARM data write cache policy"
-	default SYS_ARM_CACHE_WRITETHROUGH if TARGET_BCMCYGNUS || TARGET_BCMNS || RZA1
+	default SYS_ARM_CACHE_WRITETHROUGH if TARGET_BCMNS || RZA1
 	default SYS_ARM_CACHE_WRITEBACK
 
 config SYS_ARM_CACHE_WRITEBACK
@@ -668,19 +668,6 @@
 	select CPU_V7A
 	select PL011_SERIAL
 
-config TARGET_BCMCYGNUS
-	bool "Support bcmcygnus"
-	select CPU_V7A
-	select GPIO_EXTRA_HEADER
-	select IPROC
-	imply BCM_SF2_ETH
-	imply BCM_SF2_ETH_GMAC
-	imply CMD_HASH
-	imply CRC32_VERIFY
-	imply FAT_WRITE
-	imply HASH_VERIFY
-	imply NETDEVICES
-
 config TARGET_BCMNS
 	bool "Support Broadcom Northstar"
 	select CPU_V7A