omap3: Move to select SUPPORT_SPL for all

In reality all omap3 platforms support SPL so move the select for this
up a level.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 29c54e5..5eb72f7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -554,6 +554,7 @@
 config OMAP34XX
 	bool "OMAP34XX SoC"
 	select CPU_V7
+	select SUPPORT_SPL
 
 config OMAP44XX
 	bool "OMAP44XX SoC"