[PATCH] Documentation: DT: usage-model: Fix typo for arch/arm/kernel/devtree.c file path

[Axel Lin <axel.lin@ingics.com>]

arch/arm/kernel/devicetree.c does not exist.
The correct file path is arch/arm/kernel/devtree.c.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
 Documentation/devicetree/usage-model.txt |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/usage-model.txt b/Documentation/devicetree/usage-model.txt
index ef9d06c..8202ce5 100644
--- a/Documentation/devicetree/usage-model.txt
+++ b/Documentation/devicetree/usage-model.txt
@@ -106,7 +106,7 @@ In the majority of cases, the machine identity is irrelevant, and the
 kernel will instead select setup code based on the machine's core
 CPU or SoC.  On ARM for example, setup_arch() in
 arch/arm/kernel/setup.c will call setup_machine_fdt() in
-arch/arm/kernel/devicetree.c which searches through the machine_desc
+arch/arm/kernel/devtree.c which searches through the machine_desc
 table and selects the machine_desc which best matches the device tree
 data.  It determines the best match by looking at the 'compatible'
 property in the root device tree node, and comparing it with the
-- 
1.7.10.4