drm/amdgpu/pm/smu12: cache smu firmware version

So we print the proper SMU firmware version in debugfs, ioctls, etc.
for Renoir.
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu12/smu_v12_0.c

@@ -71,6 +71,7 @@ int smu_v12_0_check_fw_status(struct smu_context *smu)
 
 int smu_v12_0_check_fw_version(struct smu_context *smu)
 {
+	struct amdgpu_device *adev = smu->adev;
 	uint32_t if_version = 0xff, smu_version = 0xff;
 	uint16_t smu_major;
 	uint8_t smu_minor, smu_debug;
@@ -83,6 +84,8 @@ int smu_v12_0_check_fw_version(struct smu_context *smu)
 	smu_major = (smu_version >> 16) & 0xffff;
 	smu_minor = (smu_version >> 8) & 0xff;
 	smu_debug = (smu_version >> 0) & 0xff;
+	if (smu->is_apu)
+		adev->pm.fw_version = smu_version;
 
 	/*
 	 * 1. if_version mismatch is not critical as our fw is designed