[NNOP] First version of MaxPoolingFloat32 (#563)

[NNOP] First version of MaxPoolingFloat32 (#563)

* add softmax unittest

* fix typoes (IFM_H -> IFM_C)

* modify dims (batch_size and input_size)

* Fix softmax unnittest according to comments
-remove empty lines
-add empty lines to the end of codes
-resolve the conflict related with #472.
-modify equality between two floats by using nfw::util::fp32::epsilon_equal

Signed-off-by: SungJin Choi <lotieye.choi@samsung.com>
* add header files for softmax unittest

Signed-off-by: SungJin Choi <lotieye.choi@samsung.com>
* add new line

add new line at the end of file

* [NNOP] First version of MaxPoolingFloat32

Signed-off-by: SungJin Choi <lotieye.choi@samsung.com>
* initialize data with increasing value

Signed-off-by: SungJin Choi <lotieye.choi@samsung.com>
* Move maxpool kernel to cl folder

* add maxpool acl kernel operator prototypes

* add new line

* change maxpool names as #574

* change names to align function prototype  with NN runtime.