env: Finish migration of common ENV options

- In ARMv8 NXP Layerscape platforms we also need to make use of
  CONFIG_SYS_RELOC_GD_ENV_ADDR now, do so.
- On ENV_IS_IN_REMOTE, CONFIG_ENV_OFFSET is never used, drop the define
  to 0.
- Add Kconfig entry for ENV_ADDR.
- Make ENV_ADDR / ENV_OFFSET depend on the env locations that use it.
- Add ENV_xxx_REDUND options that depend on their primary option and
  SYS_REDUNDAND_ENVIRONMENT
- On a number of PowerPC platforms, use SPL_ENV_ADDR not CONFIG_ENV_ADDR
  for the pre-main-U-Boot environment location.
- On ENV_IS_IN_SPI_FLASH, check not for CONFIG_ENV_ADDR being set but
  rather it being non-zero, as it will now be zero by default.
- Rework the env_offset absolute in env/embedded.o to not use
  CONFIG_ENV_OFFSET as it was the only use of ENV_OFFSET within
  ENV_IS_IN_FLASH.
- Migrate all platforms.

Cc: Wolfgang Denk <wd@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: uboot-stm32@st-md-mailman.stormreply.com
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

include/configs/apx4devkit.h

@@ -26,19 +26,12 @@
 
 /* Environment is in MMC */
 #if defined(CONFIG_CMD_MMC) && defined(CONFIG_ENV_IS_IN_MMC)
-#define CONFIG_ENV_OFFSET		(256 * 1024)
-#define CONFIG_ENV_SIZE			(16 * 1024)
 #define CONFIG_SYS_MMC_ENV_DEV		0
 #endif
 
 /* Environment is in NAND */
 #if defined(CONFIG_CMD_NAND) && defined(CONFIG_ENV_IS_IN_NAND)
-#define CONFIG_ENV_SECT_SIZE		(128 * 1024)
-#define CONFIG_ENV_SIZE			(128 * 1024)
 #define CONFIG_ENV_RANGE		(384 * 1024)
-#define CONFIG_ENV_OFFSET		0x120000
-#define CONFIG_ENV_OFFSET_REDUND	\
-		(CONFIG_ENV_OFFSET + CONFIG_ENV_RANGE)
 #endif
 
 /* UBI and NAND partitioning */