amdgpu/powerplay: constify large struct

This moves this from being global data to global rodata, I'm
sure it would be easy to move it to being local data.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/pp_overdriver.c

 #include "pp_overdriver.h"
 #include <linux/errno.h>
 
-struct phm_fuses_default vega10_fuses_default[] = {
+const struct phm_fuses_default vega10_fuses_default[] = {
 	{"0000001000010011111010101001010011011110000011100100100101100100",0x00003C96,0xFFFFE226,0x00000656,0x00002203,0xFFFFF201,0x000003FF,0x00002203,0xFFFFF201,0x000003FF},
 	{"0000001000010011111010101001010011011110000010100001100010000100",0x00003CC5,0xFFFFE23A,0x0000064E,0x00002258,0xFFFFF1F7,0x000003FC,0x00002258,0xFFFFF1F7,0x000003FC},
 	{"0000001000010011111010101001010011011110000011100011000110100100",0x00003CAF,0xFFFFE36E,0x00000602,0x00001E98,0xFFFFF569,0x00000357,0x00001E98,0xFFFFF569,0x00000357},
@@ -1240,7 +1240,7 @@ struct phm_fuses_default vega10_fuses_default[] = {
 };
 
 int pp_override_get_default_fuse_value(uint64_t key,
-			struct phm_fuses_default list[],
+			const struct phm_fuses_default list[],
 			struct phm_fuses_default *result)
 {
 	uint32_t i;

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

@@ -40,9 +40,9 @@ struct phm_fuses_default {
 	uint32_t VFT0_b;
 };
 
-extern struct phm_fuses_default vega10_fuses_default[];
+extern const struct phm_fuses_default vega10_fuses_default[];
 extern int pp_override_get_default_fuse_value(uint64_t key,
-			struct phm_fuses_default list[],
+			const struct phm_fuses_default list[],
 			struct phm_fuses_default *result);
 
 #endif
\ No newline at end of file