ARM: tegra: make use of negative ENV_OFFSET on NVIDIA boards

Use a negative value of CONFIG_ENV_OFFSET for all NVIDIA reference boards
that store the U-Boot environment in the 2nd eMMC boot partition. This
makes U-Boot agnostic to the size of the eMMC boot partition, which can
vary depending on which eMMC device was actually stuffed into the board.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Tom Warren <twarren@nvidia.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

include/configs/beaver.h

@@ -56,7 +56,7 @@
 
 /* Environment in eMMC, at the end of 2nd "boot sector" */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET		((1024 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET		(-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV		0
 #define CONFIG_SYS_MMC_ENV_PART		2
 

include/configs/cardhu.h

@@ -55,7 +55,7 @@
 
 /* Environment in eMMC, at the end of 2nd "boot sector" */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET		((512 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET		(-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV		0
 #define CONFIG_SYS_MMC_ENV_PART		2
 

include/configs/dalmore.h

@@ -60,7 +60,7 @@
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV		0
 #define CONFIG_SYS_MMC_ENV_PART		2
-#define CONFIG_ENV_OFFSET		((4096 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET		(-CONFIG_ENV_SIZE)
 
 #define MACH_TYPE_DALMORE	4304	/* not yet in mach-types.h */
 

include/configs/paz00.h

@@ -46,7 +46,7 @@
 
 /* Environment in eMMC, at the end of 2nd "boot sector" */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET ((1024 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET (-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV 0
 #define CONFIG_SYS_MMC_ENV_PART 2
 

include/configs/seaboard.h

@@ -72,7 +72,7 @@
 
 /* Environment in eMMC, at the end of 2nd "boot sector" */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET ((512 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET (-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV 0
 #define CONFIG_SYS_MMC_ENV_PART 2
 

include/configs/ventana.h

@@ -52,7 +52,7 @@
 
 /* Environment in eMMC, at the end of 2nd "boot sector" */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET ((1024 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET (-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV 0
 #define CONFIG_SYS_MMC_ENV_PART 2
 

include/configs/whistler.h

@@ -61,12 +61,12 @@
 
 /*
  * Environment in eMMC, at the end of 2nd "boot sector". Note: This assumes
- * the user plugged the standard 8MB MoviNAND card into J29/HSMMC/POP. If
+ * the user plugged the standard 8GB MoviNAND card into J29/HSMMC/POP. If
  * they didn't, the boot sector layout may be different. However, use of that
  * particular card is standard practice as far as I know.
  */
 #define CONFIG_ENV_IS_IN_MMC
-#define CONFIG_ENV_OFFSET ((512 * 1024) - CONFIG_ENV_SIZE)
+#define CONFIG_ENV_OFFSET (-CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MMC_ENV_DEV 0
 #define CONFIG_SYS_MMC_ENV_PART 2