env: Add CONFIG_SYS_RELOC_GD_ENV_ADDR symbol

Today in initr_reloc_global_data() we use some non-obvious tests to
determine if we need to relocate the env_addr within gd or not.  In
order to facilitate migration of other symbols to Kconfig we need to
introduce a new symbol for this particular use case.

Cc: Wolfgang Denk <wd@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/pengwyn_defconfig b/configs/pengwyn_defconfig
index bd7d0a6..fefd074 100644
--- a/configs/pengwyn_defconfig
+++ b/configs/pengwyn_defconfig
@@ -47,6 +47,7 @@
 CONFIG_MTDPARTS_DEFAULT="mtdparts=omap2-nand.0:512k(SPL),512k(SPL.backup1),512k(SPL.backup2),512k(SPL.backup3),1536k(u-boot),512k(u-boot-spl-os),512k(u-boot-env),5m(kernel),-(rootfs)"
 CONFIG_CMD_DIAG=y
 CONFIG_ENV_IS_IN_NAND=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y