Added CMSIS component overview

This reverts commit 380c2af3.

The change breaks compatibility with released software components.
Anonymous structs/unions are not strict C99 but available as an extension. Its a reasonable feature to be used. The code is more clean and readable.

Change-Id: I26be856a90c6326dbb0e6cddaf13dea49a7bda9b

Change-Id: I92c3566864944d1c8c4ed1b98c54a1cf6baa5788

In arm_depthwise_conv_u8_basic_ver1.c added end of
group(Doxygen) for file.

Change-Id: I37bfdf5fbaf187d6c4e919bba8e664709b960df2

Change-Id: I7824070cb1ff1619fd36f90b15ad23d30007b811

Scaling arguments follow that of a Tensorflow tflite model.

Change-Id: I9a46a2311100cc4d021ec4c671f86e8cd8acff05

1. C equivalent for ARM NEON instruction VQRDMULH.
2. Rounding division by power of two.

Change-Id: Ia53d50661731bd16e88b71a4ba5df283f9977ce6
Signed-off-by: Felix Johnny <felixjohnny.thomasmathibalan@arm.com>

Fixed duplicated declaration of `sigmoidHTable_q15`, `sigmoidLTable_q15`.

Handle the case in max pooling when the number of channels is not multiple of 4.

- GCC complains about the unusual cast for the inital stack pointer.

Change-Id: I30084e3a47a80a84ec3cf1906cf9a3e136e76a6d

Change-Id: I8bda8f335837706f25ed11cb596d2e9d7735ee2e

- Not using anonymous struct/unions.

Change-Id: I08bce08d08c684f13bd43b04ab145d9b0ba20305

Minor change (added const to config parameter in function Activate)

corrected differences to core_cm3.

default behavior.

Default behavior is that all tests are enabled by default.
No need to define new compilation flags to enable them.

But there is a new mode which when enabled will allow to select which
tests must be run or not.

By default, this new mode is disabled and in this case all tests will
run.

DSP_Lib_TestSuite.

DSP_Lib_TestSuite can be built with cmake and run on FVP.
Some issues with CMSIS-DSP cmake where discovered and corrected.

Comments added to arm_biqaud_cascade_df2T+f32 since the Neon version
must be initialized differently (and thus the corresponding test
in DSP_Lib_TestSuite will have to be updated to pass with Neon version).

Issue was introduced by a merge on our internal branch.