drm/amdgpu: use REG32_PCIE wrapper instead for psp

This patch uses REG32_PCIE wrapper instead of writting pci_index2 and reading
pci_data2 for psp. This sequence should be protected by pcie_idx_lock.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/psp_v3_1.c

@@ -500,9 +500,7 @@ static bool psp_v3_1_smu_reload_quirk(struct psp_context *psp)
 	struct amdgpu_device *adev = psp->adev;
 	uint32_t reg;
 
-	reg = smnMP1_FIRMWARE_FLAGS | 0x03b00000;
-	WREG32_SOC15(NBIO, 0, mmPCIE_INDEX2, reg);
-	reg = RREG32_SOC15(NBIO, 0, mmPCIE_DATA2);
+	reg = RREG32_PCIE(smnMP1_FIRMWARE_FLAGS | 0x03b00000);
 	return (reg & MP1_FIRMWARE_FLAGS__INTERRUPTS_ENABLED_MASK) ? true : false;
 }