amdgpu: Wrap FPU dependent functions in dc20

dc20 containes several FPU-dependent functions without proper FPU
kernel mode enable/disable wrappers.  Add the required wrappers
for both x86 and POWER.

This enables Navi DC20 support for POWER systems.

v2: fix compilation
Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -2887,12 +2887,19 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 	bool voltage_supported = false;
 	bool full_pstate_supported = false;
 	bool dummy_pstate_supported = false;
-	double p_state_latency_us = context->bw_ctx.dml.soc.dram_clock_change_latency_us;
-	context->bw_ctx.dml.soc.disable_dram_clock_change_vactive_support = dc->debug.disable_dram_clock_change_vactive_support;
+	double p_state_latency_us;
 
-	if (fast_validate)
-		return dcn20_validate_bandwidth_internal(dc, context, true);
+	DC_FP_START();
+	p_state_latency_us = context->bw_ctx.dml.soc.dram_clock_change_latency_us;
+	context->bw_ctx.dml.soc.disable_dram_clock_change_vactive_support =
+		dc->debug.disable_dram_clock_change_vactive_support;
 
+	if (fast_validate) {
+		voltage_supported = dcn20_validate_bandwidth_internal(dc, context, true);
+
+		DC_FP_END();
+		return voltage_supported;
+	}
 
 	// Best case, we support full UCLK switch latency
 	voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false);
@@ -2921,6 +2928,7 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
 restore_dml_state:
 	context->bw_ctx.dml.soc.dram_clock_change_latency_us = p_state_latency_us;
 
+	DC_FP_END();
 	return voltage_supported;
 }
 
@@ -3442,6 +3450,8 @@ static bool dcn20_resource_construct(
 	enum dml_project dml_project_version =
 			get_dml_project_version(ctx->asic_id.hw_internal_rev);
 
+	DC_FP_START();
+
 	ctx->dc_bios->regs = &bios_regs;
 	pool->base.funcs = &dcn20_res_pool_funcs;
 
@@ -3739,10 +3749,12 @@ static bool dcn20_resource_construct(
 		pool->base.oem_device = NULL;
 	}
 
+	DC_FP_END();
 	return true;
 
 create_fail:
 
+	DC_FP_END();
 	dcn20_resource_destruct(pool);
 
 	return false;