MIPS: BCM63XX: Add basic BCM6328 support

This includes CPU speed, memory size detection and working UART, but
lacking the appropriate drivers, no support for attached flash.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/3951/
Reviewed-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/bcm63xx/Kconfig b/arch/mips/bcm63xx/Kconfig
index 6b1b9ad..09e93ca 100644
--- a/arch/mips/bcm63xx/Kconfig
+++ b/arch/mips/bcm63xx/Kconfig
@@ -1,6 +1,9 @@
 menu "CPU support"
 	depends on BCM63XX
 
+config BCM63XX_CPU_6328
+	bool "support 6328 CPU"
+
 config BCM63XX_CPU_6338
 	bool "support 6338 CPU"
 	select HW_HAS_PCI