ARM: tegra: fix malloc region sizing

Commit 52a7c98a17 "tegra-common: increase malloc pool len by dfu mmc
file buffer size" updated the definition of CONFIG_SYS_MALLOC_LEN for
Tegra to take account of the DFU buffer size. However, this change had
no effect, since typical Tegra board config headers don't set the DFU-
related defines until after tegra-common.h is included. Fix this by
moving the affected conditional code to tegra-common-post.h, which is
included last. Also move the definition of SYS_NONCACHED_MEMORY since
it's a related and adjacent definition.

Fix the condition to test for the DFU feature, rather than specifically
MMC DFU support, so it applies in all cases.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

include/configs/tegra-common-post.h

@@ -8,6 +8,20 @@
 #ifndef __TEGRA_COMMON_POST_H
 #define __TEGRA_COMMON_POST_H
 
+/*
+ * Size of malloc() pool
+ */
+#ifdef CONFIG_USB_FUNCTION_DFU
+#define CONFIG_SYS_MALLOC_LEN		((4 << 20) + \
+						CONFIG_SYS_DFU_DATA_BUF_SIZE)
+#else
+#define CONFIG_SYS_MALLOC_LEN		(4 << 20)	/* 4MB  */
+#endif
+
+#ifndef CONFIG_ARM64
+#define CONFIG_SYS_NONCACHED_MEMORY	(1 << 20)	/* 1 MiB */
+#endif
+
 #ifndef CONFIG_SPL_BUILD
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 1) \

include/configs/tegra-common.h

@@ -37,20 +37,6 @@
 #define CONFIG_ENV_SIZE			0x2000	/* Total Size Environment */
 
 /*
- * Size of malloc() pool
- */
-#ifdef CONFIG_DFU_MMC
-#define CONFIG_SYS_MALLOC_LEN		((4 << 20) + \
-					CONFIG_SYS_DFU_DATA_BUF_SIZE)
-#else
-#define CONFIG_SYS_MALLOC_LEN		(4 << 20)	/* 4MB  */
-#endif
-
-#ifndef CONFIG_ARM64
-#define CONFIG_SYS_NONCACHED_MEMORY	(1 << 20)       /* 1 MiB */
-#endif
-
-/*
  * NS16550 Configuration
  */
 #define CONFIG_TEGRA_SERIAL