davinci: Kconfig: enable EVMs by default when SoCs are enabled

Signed-off-by: Kevin Hilman <khilman@ti.deeprootsystems.com>

arch/arm/mach-davinci/Kconfig

@@ -26,7 +26,7 @@ comment "DaVinci Board Type"
 
 config MACH_DAVINCI_EVM
 	bool "TI DM644x EVM"
-	default y
+	default ARCH_DAVINCI_DM644x
 	depends on ARCH_DAVINCI_DM644x
 	help
 	  Configure this option to specify the whether the board used
@@ -42,7 +42,7 @@ config MACH_SFFSDR
 
 config MACH_DAVINCI_DM355_EVM
 	bool "TI DM355 EVM"
-	default n
+	default ARCH_DAVINCI_DM355
 	depends on ARCH_DAVINCI_DM355
 	help
 	  Configure this option to specify the whether the board used
@@ -58,7 +58,7 @@ config MACH_DM355_LEOPARD
 
 config MACH_DAVINCI_DM6467_EVM
 	bool "TI DM6467 EVM"
-	default n
+	default ARCH_DAVINCI_DM646x
 	depends on ARCH_DAVINCI_DM646x
 	help
 	  Configure this option to specify the whether the board used