drm/radeon: export radeon_atombios_lookup_gpio

We need it for dpm.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 04db2fd..0ef1413 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -748,6 +748,8 @@
 extern bool radeon_atombios_get_asic_ss_info(struct radeon_device *rdev,
 					     struct radeon_atom_ss *ss,
 					     int id, u32 clock);
+extern struct radeon_gpio_rec radeon_atombios_lookup_gpio(struct radeon_device *rdev,
+							  u8 id);
 
 extern void radeon_compute_pll_legacy(struct radeon_pll *pll,
 				      uint64_t freq,