Convert CONFIG_SPL_GD_ADDR to Kconfig

This converts the following to Kconfig:
   CONFIG_SPL_GD_ADDR

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 10d9cdd..027ac42 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -246,6 +246,10 @@
 config SPL_SKIP_RELOCATE
 	bool "Skip relocating SPL"
 
+config SPL_GD_ADDR
+	hex "Address to use for global data (gd) in SPL"
+	depends on !SPL_INIT_MINIMAL
+
 config SPL_RELOC_TEXT_BASE
 	hex "Address to relocate SPL to"
 	default SPL_TEXT_BASE
@@ -272,6 +276,10 @@
 	hex "Size of malloc pool in SPL"
 	depends on SPL_RELOC_MALLOC
 
+config TPL_GD_ADDR
+	hex "Address to use for global data (gd) in TPL"
+	depends on TPL
+
 config TPL_RELOC_TEXT_BASE
 	hex "Address to relocate TPL to"
 	depends on TPL