omap3: Define common SPL text base in Kconfig instead of defconfigs

The SPL text base was defined to the same value in each OMAP3 board
defconfig. Move the common definition to the Kconfig option
declaration instead.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Tested-by: Adam Ford <aford173@gmail.com> #am3517-evm
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 6f56ca9..6fc97f4 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -261,6 +261,7 @@
 
 config SPL_TEXT_BASE
 	hex "SPL Text Base"
+	default 0x40200000 if OMAP34XX
 	default 0x402F4000 if AM43XX
 	default 0x402F0400 if AM33XX
 	default 0x40301350 if OMAP54XX