ARM: exynos: Make ARCH_EXYNOS3 a default option

By default for ARMv7 Exynos platform we select all flavors.  One kernel
image simplifies testing and maintenance.  However Exynos3 was not
selected by default so far (thus it was not present in multi_v7
kernel).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/mach-exynos/Kconfig

@@ -49,6 +49,7 @@ config S5P_DEV_MFC
 
 config ARCH_EXYNOS3
 	bool "SAMSUNG EXYNOS3"
+	default y
 	select ARM_CPU_SUSPEND if PM
 	help
 	  Samsung EXYNOS3 (Cortex-A7) SoC based systems