ARM: armv7: add non-SPL enable for Cortex SMPEN

Commit 2564fce7eea3 ("sunxi: move Cortex SMPEN setting into start.S")
added SPL_ARMV7_SET_CORTEX_SMPEN to enable setting SMP bit. For
platforms not using SPL boot, add the corresponding non-SPL config,
so that CONFIG_IS_ENABLED(ARMV7_SET_CORTEX_SMPEN) works as expected.

Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/arch/arm/cpu/armv7/Kconfig b/arch/arm/cpu/armv7/Kconfig
index f1e4e26..e33e536 100644
--- a/arch/arm/cpu/armv7/Kconfig
+++ b/arch/arm/cpu/armv7/Kconfig
@@ -107,6 +107,11 @@
 	Say Y here to use the long descriptor page table format. This is
 	required if U-Boot runs in HYP mode.
 
+config ARMV7_SET_CORTEX_SMPEN
+	bool
+	help
+	  Enable the ARM Cortex ACTLR.SMP enable bit in U-boot.
+
 config SPL_ARMV7_SET_CORTEX_SMPEN
 	bool
 	help