drm/amd/display: Use seperate dmcub firmware for navy_flounder

[Why]
Currently navy_flounder is using sienna_cichlid_dmcub.bin.

[How]
Create a seperate define so navy_flounder will use its own firmware.
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -97,6 +97,8 @@ MODULE_FIRMWARE(FIRMWARE_RENOIR_DMUB);
 #if defined(CONFIG_DRM_AMD_DC_DCN3_0)
 #define FIRMWARE_SIENNA_CICHLID_DMUB "amdgpu/sienna_cichlid_dmcub.bin"
 MODULE_FIRMWARE(FIRMWARE_SIENNA_CICHLID_DMUB);
+#define FIRMWARE_NAVY_FLOUNDER_DMUB "amdgpu/navy_flounder_dmcub.bin"
+MODULE_FIRMWARE(FIRMWARE_NAVY_FLOUNDER_DMUB);
 #endif
 
 #define FIRMWARE_RAVEN_DMCU		"amdgpu/raven_dmcu.bin"
@@ -1185,10 +1187,13 @@ static int dm_dmub_sw_init(struct amdgpu_device *adev)
 		break;
 #if defined(CONFIG_DRM_AMD_DC_DCN3_0)
 	case CHIP_SIENNA_CICHLID:
-	case CHIP_NAVY_FLOUNDER:
 		dmub_asic = DMUB_ASIC_DCN30;
 		fw_name_dmub = FIRMWARE_SIENNA_CICHLID_DMUB;
 		break;
+	case CHIP_NAVY_FLOUNDER:
+		dmub_asic = DMUB_ASIC_DCN30;
+		fw_name_dmub = FIRMWARE_NAVY_FLOUNDER_DMUB;
+		break;
 #endif
 
 	default: