drm/amdgpu: do not store bios_header_start in amdgpu_device

It is only used locally in amdgpu_get_bios
Signed-off-by: NNils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1924,7 +1924,6 @@ struct amdgpu_device {
 	/* BIOS */
 	uint8_t				*bios;
 	bool				is_atom_bios;
-	uint16_t			bios_header_start;
 	struct amdgpu_bo		*stollen_vga_memory;
 	uint32_t			bios_scratch[AMDGPU_BIOS_NUM_SCRATCH];
 

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

@@ -349,7 +349,7 @@ static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
 bool amdgpu_get_bios(struct amdgpu_device *adev)
 {
 	bool r;
-	uint16_t tmp;
+	uint16_t tmp, bios_header_start;
 
 	r = amdgpu_atrm_get_bios(adev);
 	if (r == false)
@@ -383,11 +383,11 @@ bool amdgpu_get_bios(struct amdgpu_device *adev)
 		goto free_bios;
 	}
 
-	adev->bios_header_start = RBIOS16(0x48);
-	if (!adev->bios_header_start) {
+	bios_header_start = RBIOS16(0x48);
+	if (!bios_header_start) {
 		goto free_bios;
 	}
-	tmp = adev->bios_header_start + 4;
+	tmp = bios_header_start + 4;
 	if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
 	    !memcmp(adev->bios + tmp, "MOTA", 4)) {
 		adev->is_atom_bios = true;