drm/amdgpu: Drop redundant unsigned >=0 comparision 'amdgpu_gfx_rlc_init_microcode()'

unsigned int "version_minor" is always >= 0

Fixes the below:
drivers/gpu/drm/amd/amdgpu/amdgpu_rlc.c:534 amdgpu_gfx_rlc_init_microcode() warn: always true condition '(version_minor >= 0) => (0-u16max >= 0)'

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -531,13 +531,12 @@ int amdgpu_gfx_rlc_init_microcode(struct amdgpu_device *adev,
 	if (version_major == 2 && version_minor == 1)
 		adev->gfx.rlc.is_rlc_v2_1 = true;
 
-	if (version_minor >= 0) {
 	err = amdgpu_gfx_rlc_init_microcode_v2_0(adev);
 	if (err) {
 		dev_err(adev->dev, "fail to init rlc v2_0 microcode\n");
 		return err;
 	}
-	}
+
 	if (version_minor >= 1)
 		amdgpu_gfx_rlc_init_microcode_v2_1(adev);
 	if (version_minor >= 2)