MIPS: lantiq: implement support for clkdev api

This patch unifies all clock generation and gating code into one file.
All drivers will now be able to request their clocks via their device.
This patch also adds support for the clockout feature, which allows
clock generation on external pins.

Support for COMMON_CLK will be provided in the next series.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3804/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index fbb5639..22058dc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -228,7 +228,8 @@
 	select ARCH_REQUIRE_GPIOLIB
 	select SWAP_IO_SPACE
 	select BOOT_RAW
-	select HAVE_CLK
+	select HAVE_MACH_CLKDEV
+	select CLKDEV_LOOKUP
 	select USE_OF
 
 config LASAT