Remove TF-M prefix on base folders

This patch removes the 'TF-M' prefix for those doc snippets referring
to the base folder, which is the folder where all TF-M related
repositories reside. With this change, there are now two different
type of base folders on the documentation:

* '<base folder>' is the base folder of all TF-M related repositories,
i.e. '~/TF'

* '<TF-M base folder>' is the base folder of trusted-firmware-m
repository, .i.e '~/TF/trusted-firmware-m'

Change-Id: Ib2d61bfafb337a36a4b0e98b25bac2d4079768c2
Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
diff --git a/docs/getting_started/tfm_build_instruction.rst b/docs/getting_started/tfm_build_instruction.rst
index b96741c..60edb75 100644
--- a/docs/getting_started/tfm_build_instruction.rst
+++ b/docs/getting_started/tfm_build_instruction.rst
@@ -26,7 +26,7 @@
 =======================
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     git clone https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git
     git clone https://github.com/ARMmbed/mbed-crypto.git -b mbedcrypto-3.0.1
     git clone https://git.trustedfirmware.org/TF-M/tf-m-tests.git
@@ -44,7 +44,7 @@
 ==========================================
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_build
     cd cmake_build
@@ -57,7 +57,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_test
     cd cmake_test
@@ -68,7 +68,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_test
     cd cmake_test
@@ -97,7 +97,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_psa_test
     cd cmake_psa_test
@@ -120,7 +120,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     python tools/tfm_parse_manifest_list.py -m tools/tfm_psa_ff_test_manifest_list.yaml append
 
@@ -136,7 +136,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_psa_test
     cd cmake_psa_test
diff --git a/docs/getting_started/tfm_build_instruction_iar.rst b/docs/getting_started/tfm_build_instruction_iar.rst
index a2c1846..facb744 100644
--- a/docs/getting_started/tfm_build_instruction_iar.rst
+++ b/docs/getting_started/tfm_build_instruction_iar.rst
@@ -43,7 +43,7 @@
 ============
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_build
     cd cmake_build
@@ -56,7 +56,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_test
     cd cmake_test
@@ -67,7 +67,7 @@
 
 .. code-block:: bash
 
-    cd <TF-M base folder>
+    cd <base folder>
     cd trusted-firmware-m
     mkdir cmake_test
     cd cmake_test
diff --git a/docs/getting_started/tfm_secure_boot.rst b/docs/getting_started/tfm_secure_boot.rst
index 7798f53..cec838a 100644
--- a/docs/getting_started/tfm_secure_boot.rst
+++ b/docs/getting_started/tfm_secure_boot.rst
@@ -281,7 +281,7 @@
 in TF-M. The repository must be cloned into the base folder (into which TF-M
 was cloned previously).::
 
-    cd <TF-M base folder>
+    cd <base folder>
     git clone https://github.com/JuulLabs-OSS/mcuboot.git -b v1.6.0
     cd <TF-M build folder>
     cmake -G"Unix Makefiles" -DTARGET_PLATFORM=AN521 -DCOMPILER=ARMCLANG -DMCUBOOT_REPO=UPSTREAM ../