clk: bcm: Make COMMON_CLK_IPROC into a library

The broadcom clk driver Kconfig file selects and depends on the
COMMON_CLK_IPROC config for different SoC specific drivers. Let's
simplify this by always selecting the COMMON_CLK_IPROC config,
turning it into a set of library code. We still want to retain
the SoC specific options, so we leave those in place. Since we're
here we also drop COMMON_CLK dependency because that's implicitly
handled by including this file in drivers/clk/Kconfig in the
right place and also make CLK_BCM_KONA default to y on the
architecture it exists for instead of plain default y.

Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ray Jui <ray.jui@broadcom.com>
Cc: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/bcm/Kconfig

 config CLK_BCM_63XX
 	bool "Broadcom BCM63xx clock support"
 	depends on ARCH_BCM_63XX || COMPILE_TEST
-	depends on COMMON_CLK
 	select COMMON_CLK_IPROC
 	default ARCH_BCM_63XX
 	help
@@ -11,27 +10,22 @@ config CLK_BCM_63XX
 config CLK_BCM_KONA
 	bool "Broadcom Kona CCU clock support"
 	depends on ARCH_BCM_MOBILE || COMPILE_TEST
-	depends on COMMON_CLK
-	default y
+	default ARCH_BCM_MOBILE
 	help
 	  Enable common clock framework support for Broadcom SoCs
 	  using "Kona" style clock control units, including those
 	  in the BCM281xx and BCM21664 families.
 
 config COMMON_CLK_IPROC
-	bool "Broadcom iProc clock support"
-	depends on ARCH_BCM_IPROC || ARCH_BCM_63XX || COMPILE_TEST
-	depends on COMMON_CLK
-	default ARCH_BCM_IPROC
+	bool
 	help
 	  Enable common clock framework support for Broadcom SoCs
 	  based on the iProc architecture
 
-if COMMON_CLK_IPROC
-
 config CLK_BCM_CYGNUS
 	bool "Broadcom Cygnus clock support"
 	depends on ARCH_BCM_CYGNUS || COMPILE_TEST
+	select COMMON_CLK_IPROC
 	default ARCH_BCM_CYGNUS
 	help
 	  Enable common clock framework support for the Broadcom Cygnus SoC
@@ -39,6 +33,7 @@ config CLK_BCM_CYGNUS
 config CLK_BCM_NSP
 	bool "Broadcom Northstar/Northstar Plus clock support"
 	depends on ARCH_BCM_5301X || ARCH_BCM_NSP || COMPILE_TEST
+	select COMMON_CLK_IPROC
 	default ARCH_BCM_5301X || ARCH_BCM_NSP
 	help
 	  Enable common clock framework support for the Broadcom Northstar and
@@ -47,8 +42,7 @@ config CLK_BCM_NSP
 config CLK_BCM_NS2
 	bool "Broadcom Northstar 2 clock support"
 	depends on ARCH_BCM_IPROC || COMPILE_TEST
+	select COMMON_CLK_IPROC
 	default ARCH_BCM_IPROC
 	help
 	  Enable common clock framework support for the Broadcom Northstar 2 SoC
-
-endif