[U-Boot] [PATCH] imx: Use a convenient default value for SYS_MALLOC_F_LEN

[Fabio Estevam <festevam@gmail.com>]

Commit 3a7c45f6a772 ("simple-bus: add DM_FLAG_PRE_RELOC flag to
simple-bus driver") causes some i.MX boards that were converted
to DM, such as warp7, to fail to boot.

As explained by Lukas Auer:

"With the patch, U-Boot probes the drivers for devices under simple-bus
device tree nodes in the pre-relocation device model. The default value
of CONFIG_SYS_MALLOC_F_LEN (0x400) leaves U-Boot with not enough memory to
do this, causing it to hang."

Fix this problem by providing a convenient default value for
CONFIG_SYS_MALLOC_F_LEN.

Reported-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Suggested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
 arch/arm/mach-imx/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index ec09ef240f..a7a7d84b7a 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -90,3 +90,6 @@ config DDRMC_VF610_CALIBRATION
 	  NXP does NOT recommend to perform this calibration at each boot. One
 	  shall perform it on a new PCB and then use those values to program
 	  the ddrmc_cr_setting on relevant board file.
+
+config SYS_MALLOC_F_LEN
+	default 0x2000
-- 
2.17.1