drm/amd: make some function-local tables static const

These tables were initialized on stack on each call, avoid that
and save a little bit of text size.

Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Nils Wallménius <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c

···
 void amdgpu_benchmark(struct amdgpu_device *adev, int test_number)
 {
 	int i;
-	int common_modes[AMDGPU_BENCHMARK_COMMON_MODES_N] = {
+	static const int common_modes[AMDGPU_BENCHMARK_COMMON_MODES_N] = {
 		640 * 480 * 4,
 		720 * 480 * 4,
 		800 * 600 * 4,

drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c

···
 	struct drm_display_mode *mode = NULL;
 	struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
 	int i;
-	struct mode_size {
+	static const struct mode_size {
 		int w;
 		int h;
 	} common_modes[17] = {

drivers/gpu/drm/amd/powerplay/hwmgr/ppevvmath.h

···
 	fInt solution = fPositiveOne; /*Starting off with baseline of 1 */
 	fInt error_term;
 
-	uint32_t k_array[11] = {55452, 27726, 13863, 6931, 4055, 2231, 1178, 606, 308, 155, 78};
-	uint32_t expk_array[11] = {2560000, 160000, 40000, 20000, 15000, 12500, 11250, 10625, 10313, 10156, 10078};
+	static const uint32_t k_array[11] = {55452, 27726, 13863, 6931, 4055, 2231, 1178, 606, 308, 155, 78};
+	static const uint32_t expk_array[11] = {2560000, 160000, 40000, 20000, 15000, 12500, 11250, 10625, 10313, 10156, 10078};
 
 	if (GreaterThan(fZERO, exponent)) {
 		exponent = fNegate(exponent);
···
 	fInt solution = ConvertToFraction(0); /*Starting off with baseline of 0 */
 	fInt error_term;
 
-	uint32_t k_array[10] = {160000, 40000, 20000, 15000, 12500, 11250, 10625, 10313, 10156, 10078};
-	uint32_t logk_array[10] = {27726, 13863, 6931, 4055, 2231, 1178, 606, 308, 155, 78};
+	static const uint32_t k_array[10] = {160000, 40000, 20000, 15000, 12500, 11250, 10625, 10313, 10156, 10078};
+	static const uint32_t logk_array[10] = {27726, 13863, 6931, 4055, 2231, 1178, 606, 308, 155, 78};
 
 	while (GreaterThan(fAdd(value, fNegativeOne), upper_bound)) {
 		for (i = 0; i < 10; i++) {