arm: mx6: Reduce SPL malloc pool size

Using 50 MiB malloc pool in SPL is nonsense. Since the caches are not
enabled in SPL, it takes 2 seconds to init the pool and has no obvious
benefit. Reduce the size to 1 MiB.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Tested-by: Stefano Babic <sbabic@denx.de>
Acked-by: Tim Harvey <tharvey@gateworks.com>

include/configs/imx6_spl.h

@@ -63,15 +63,15 @@
 
 #if defined(CONFIG_MX6SX) || defined(CONFIG_MX6UL) || defined(CONFIG_MX6SL)
 #define CONFIG_SPL_BSS_START_ADDR      0x88200000
-#define CONFIG_SPL_BSS_MAX_SIZE        0x100000        /* 1 MB */
+#define CONFIG_SPL_BSS_MAX_SIZE        0x100000		/* 1 MB */
 #define CONFIG_SYS_SPL_MALLOC_START    0x88300000
-#define CONFIG_SYS_SPL_MALLOC_SIZE     0x3200000       /* 50 MB */
+#define CONFIG_SYS_SPL_MALLOC_SIZE     0x100000		/* 1 MB */
 #define CONFIG_SYS_TEXT_BASE           0x87800000
 #else
 #define CONFIG_SPL_BSS_START_ADDR	0x18200000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x100000	/* 1 MB */
 #define CONFIG_SYS_SPL_MALLOC_START	0x18300000
-#define CONFIG_SYS_SPL_MALLOC_SIZE	0x3200000	/* 50 MB */
+#define CONFIG_SYS_SPL_MALLOC_SIZE	0x100000	/* 1 MB */
 #define CONFIG_SYS_TEXT_BASE		0x17800000
 #endif
 #endif