DRC: math: Add exponential source files to the window and aural CMakeLists.

For the C code mock up test, add the HiFi exponential
source files to the window and auditory CMakeLists.

Signed-off-by: shastry <malladi.sastry@intel.com>

Author: ShriramShastry

test/cmocka/src/math/auditory/CMakeLists.txt

@@ -10,5 +10,4 @@ cmocka_test(auditory
 	${PROJECT_SOURCE_DIR}/src/math/decibels.c
 	${PROJECT_SOURCE_DIR}/src/math/numbers.c
 	${PROJECT_SOURCE_DIR}/src/math/exp_fcn.c
-	${PROJECT_SOURCE_DIR}/src/math/exp_fcn_hifi.c
 )

test/cmocka/src/math/window/CMakeLists.txt

@@ -8,4 +8,5 @@ cmocka_test(window
 	${PROJECT_SOURCE_DIR}/src/math/base2log.c
 	${PROJECT_SOURCE_DIR}/src/math/decibels.c
 	${PROJECT_SOURCE_DIR}/src/math/exp_fcn.c
+	${PROJECT_SOURCE_DIR}/src/math/exp_fcn_hifi.c
 )