drivers/amdgpu: Use canonical form in branch predicates

Found-by: Coccinelle
Signed-off-by: Edward O'Callaghan <[e-mail]>
Reviewed-by: Tom St Denis <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	uint16_t tmp, bios_header_start;
 
 	r = amdgpu_atrm_get_bios(adev);
-	if (r == false)
+	if (!r)
 		r = amdgpu_acpi_vfct_bios(adev);
-	if (r == false)
+	if (!r)
 		r = igp_read_bios_from_vram(adev);
-	if (r == false)
+	if (!r)
 		r = amdgpu_read_bios(adev);
-	if (r == false) {
+	if (!r) {
 		r = amdgpu_read_bios_from_rom(adev);
 	}
-	if (r == false) {
+	if (!r) {
 		r = amdgpu_read_disabled_bios(adev);
 	}
-	if (r == false) {
+	if (!r) {
 		r = amdgpu_read_platform_bios(adev);
 	}
-	if (r == false || adev->bios == NULL) {
+	if (!r || adev->bios == NULL) {
 		DRM_ERROR("Unable to locate a BIOS ROM\n");
 		adev->bios = NULL;
 		return false;

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

···
 
 	if (pi->mclk_stutter_mode_threshold &&
 	    (memory_clock <= pi->mclk_stutter_mode_threshold) &&
-	    (pi->uvd_enabled == false) &&
+	    (!pi->uvd_enabled) &&
 	    (RREG32(mmDPG_PIPE_STUTTER_CONTROL) & DPG_PIPE_STUTTER_CONTROL__STUTTER_ENABLE_MASK) &&
 	    (adev->pm.dpm.new_active_crtc_count <= 2))
 		memory_level->StutterEnable = true;

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

···
 	uint32_t tmp;
 
 	tmp = RREG32(mmCONFIG_CNTL);
-	if (state == false)
+	if (!state)
 		tmp |= CONFIG_CNTL__VGA_DIS_MASK;
 	else
 		tmp &= ~CONFIG_CNTL__VGA_DIS_MASK;

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

···
 	u32 me_cntl;
 	int i;
 
-	if (enable == false) {
+	if (!enable) {
 		cik_sdma_gfx_stop(adev);
 		cik_sdma_rlc_stop(adev);
 	}

drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c

···
 	u32 f32_cntl;
 	int i;
 
-	if (enable == false) {
+	if (!enable) {
 		sdma_v2_4_gfx_stop(adev);
 		sdma_v2_4_rlc_stop(adev);
 	}

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

···
 	u32 f32_cntl;
 	int i;
 
-	if (enable == false) {
+	if (!enable) {
 		sdma_v3_0_gfx_stop(adev);
 		sdma_v3_0_rlc_stop(adev);
 	}