Update Pseudo-TA path

optee_os commit 5843bb755f15 ("core: move PTAs from core/arch/arm/pta
to core/pta") has moved the Pseudo-TA source file stats.c. Update the
documentation accordingly.

Link: https://github.com/OP-TEE/optee_os/commit/5843bb755f15
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/architecture/trusted_applications.rst b/architecture/trusted_applications.rst
index 2953115..be186a4 100644
--- a/architecture/trusted_applications.rst
+++ b/architecture/trusted_applications.rst
@@ -14,7 +14,7 @@
 Pseudo Trusted Applications
 ***************************
 These are implemented directly to the OP-TEE core tree in, e.g.,
-``core/arch/arm/pta`` and are built along with and statically built into the
+``core/pta`` and are built along with and statically built into the
 OP-TEE core blob.
 
 The Pseudo Trusted Applications included in OP-TEE already are OP-TEE secure
@@ -35,7 +35,7 @@
 In most cases an unprivileged (user mode) TA is the best choice instead of
 adding your code directly to the OP-TEE core. However if you decide your
 application is best handled directly in OP-TEE core like this, you can look at
-``core/arch/arm/pta/stats.c`` as a template and just add your Pseudo TA based on
+``core/pta/stats.c`` as a template and just add your Pseudo TA based on
 that to the ``sub.mk`` in the same directory.
 
 .. _user_mode_ta: