drm/amdgpu: fix incompatible types in conditional expression

Use proper type.

Fixes: 9d4346bd ("drm/amdgpu: add VPE 6.1.0 support")
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Solomon Chiu <solomon.chiu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202309020608.FwP8QMht-lkp@intel.comSigned-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -31,7 +31,7 @@ struct amdgpu_vpe;
 
 struct vpe_funcs {
 	uint32_t (*get_reg_offset)(struct amdgpu_vpe *vpe, uint32_t inst, uint32_t offset);
-	void (*set_regs)(struct amdgpu_vpe *vpe);
+	int (*set_regs)(struct amdgpu_vpe *vpe);
 	int (*irq_init)(struct amdgpu_vpe *vpe);
 	int (*init_microcode)(struct amdgpu_vpe *vpe);
 	int (*load_microcode)(struct amdgpu_vpe *vpe);

drivers/gpu/drm/amd/amdgpu/vpe_v6_1.c

@@ -254,13 +254,15 @@ static int vpe_v6_1_process_trap_irq(struct amdgpu_device *adev,
 	return 0;
 }
 
-static void vpe_v6_1_set_regs(struct amdgpu_vpe *vpe)
+static int vpe_v6_1_set_regs(struct amdgpu_vpe *vpe)
 {
 	vpe->regs.queue0_rb_rptr_lo = regVPEC_QUEUE0_RB_RPTR;
 	vpe->regs.queue0_rb_rptr_hi = regVPEC_QUEUE0_RB_RPTR_HI;
 	vpe->regs.queue0_rb_wptr_lo = regVPEC_QUEUE0_RB_WPTR;
 	vpe->regs.queue0_rb_wptr_hi = regVPEC_QUEUE0_RB_WPTR_HI;
 	vpe->regs.queue0_preempt = regVPEC_QUEUE0_PREEMPT;
+
+	return 0;
 }
 
 static const struct vpe_funcs vpe_v6_1_funcs = {