clk: at91: add PMC smd clock

This patch adds at91 smd (Soft Modem) clock implementation using common clk
framework.

Not used by any driver right now.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index b76dc4c..97033f7 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -39,6 +39,9 @@
 config AT91_SAM9_TIME
 	bool
 
+config HAVE_AT91_SMD
+	bool
+
 config SOC_AT91SAM9
 	bool
 	select AT91_SAM9_TIME
@@ -85,6 +88,7 @@
 	select HAVE_AT91_DBGU1
 	select AT91_USE_OLD_CLK
 	select HAVE_AT91_UTMI
+	select HAVE_AT91_SMD
 	select HAVE_AT91_USB_CLK
 	help
 	  Select this if you are using one of Atmel's SAMA5D3 family SoC.
@@ -157,6 +161,7 @@
 	select SOC_AT91SAM9
 	select AT91_USE_OLD_CLK
 	select HAVE_AT91_UTMI
+	select HAVE_AT91_SMD
 	select HAVE_AT91_USB_CLK
 	help
 	  Select this if you are using one of Atmel's AT91SAM9x5 family SoC.