configs: convert CONFIG_SYS_MPUCLK to Kconfig

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 5bca20e..d3f3802 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -148,6 +148,11 @@
 
 endchoice
 
+config SYS_MPUCLK
+	int "MPU CLK speed"
+	default 550
+	help
+	  Defines the MPU clock speed (in MHz).
 
 config TI_SECURE_DEVICE
 	bool "HS Device Type Support"