ARM: mach-snapdragon: configure a larger default SYS_MALLOC_LEN for fastboot

Fastboot is very hungry when it flashes larges chunks, and 8MiB
is way too small, allocate a much bigger size like other platforms
using Fastboot.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # rb1
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/arch/arm/mach-snapdragon/Kconfig b/arch/arm/mach-snapdragon/Kconfig
index 536960b..2985d9d 100644
--- a/arch/arm/mach-snapdragon/Kconfig
+++ b/arch/arm/mach-snapdragon/Kconfig
@@ -11,6 +11,9 @@
 	  Based on this option board/<CONFIG_SYS_VENDOR>/<CONFIG_SYS_BOARD>
 	  will be used as the custom board directory.
 
+config SYS_MALLOC_LEN
+	default 0x10000000
+
 config SYS_MALLOC_F_LEN
 	default 0x2000