drm/amdgpu: fix firmware info version checks

commit a8a04c99 upstream.

Some of the checks didn't handle frev 2 tables properly.
amdgpu doesn't support any tables pre-frev 2, so drop
the checks.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -566,16 +566,11 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev)
 		    le16_to_cpu(firmware_info->info.usReferenceClock);
 		ppll->reference_div = 0;
 
-		if (crev < 2)
-			ppll->pll_out_min =
-				le16_to_cpu(firmware_info->info.usMinPixelClockPLL_Output);
-		else
 		ppll->pll_out_min =
 			le32_to_cpu(firmware_info->info_12.ulMinPixelClockPLL_Output);
 		ppll->pll_out_max =
 		    le32_to_cpu(firmware_info->info.ulMaxPixelClockPLL_Output);
 
-		if (crev >= 4) {
 		ppll->lcd_pll_out_min =
 			le16_to_cpu(firmware_info->info_14.usLcdMinPixelClockPLL_Output) * 100;
 		if (ppll->lcd_pll_out_min == 0)
@@ -584,10 +579,6 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev)
 			le16_to_cpu(firmware_info->info_14.usLcdMaxPixelClockPLL_Output) * 100;
 		if (ppll->lcd_pll_out_max == 0)
 			ppll->lcd_pll_out_max = ppll->pll_out_max;
-		} else {
-			ppll->lcd_pll_out_min = ppll->pll_out_min;
-			ppll->lcd_pll_out_max = ppll->pll_out_max;
-		}
 
 		if (ppll->pll_out_min == 0)
 			ppll->pll_out_min = 64800;