[U-Boot] [PATCH V2] ARM: tegra: enable STDIO deregistration

[Stephen Warren]

From: Stephen Warren <swarren at nvidia.com>

At the very least when USB keyboard support is enabled, we need to enable
CONFIG_SYS_STDIO_DEREGISTER, so the "usb reset" is able to re-scan USB
ports and find new devices. Enable it everywhere per request from Simon
Glass.

Signed-off-by: Stephen Warren <swarren at nvidia.com>
---
v2: Always enable the option, and hence do so in a different file.

Since v1 missed the v2015.04 release, here's v2 that implements the "post
release" request from Simon right from the get-go.
---
 include/configs/tegra-common.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/configs/tegra-common.h b/include/configs/tegra-common.h
index 2cf1f68404b1..7ae179235484 100644
--- a/include/configs/tegra-common.h
+++ b/include/configs/tegra-common.h
@@ -89,6 +89,9 @@
 
 #define CONFIG_CONSOLE_MUX
 #define CONFIG_SYS_CONSOLE_IS_IN_ENV
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_SYS_STDIO_DEREGISTER
+#endif
 
 /*
  * Miscellaneous configurable options
-- 
1.9.1