drm/amd: Remove needless break for legacy IP discovery MP0 9.0.0

There is already a "default" case in the switch block, so there is
no need to have a break after the switch block.
Reviewed-by: Aaron Liu <aaron.liu@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1072,7 +1072,6 @@ static const char *amdgpu_ucode_legacy_naming(struct amdgpu_device *adev, int bl
 			default:
 				return NULL;
 			}
-			break;
 		case IP_VERSION(10, 0, 0):
 		case IP_VERSION(10, 0, 1):
 			if (adev->asic_type == CHIP_RAVEN) {